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Forfatter
A.F. Serbin
AGS
AJC Grierson, DG Long
Aksel Olsen
Alec Pridgeon
Allan Leslie
Alpine Garden society
Alvin Horton
American Rhododendron Society
Arthur Hellyes
Axel Olsen
B.J. Coppins
Barbara Oozeerally, Jim Gardener, Stephen A. Spongberg
Benjamin Øllgaard, Kirsten Tind
Birgitt Busch, Nina Ewald
Birthe Høegh
Bjarne Leth Nielsen
Bjarne LethNielsen, Steffen Munck-Hansen, redaktører
Bo Mossberg, Lennart Stenberg
Bob Gibbons
Bradley Mayhew, Korina Miller and Alex English
Brenda Mclean
Brian Ritterhausen, Sara Ritterhausen
C. Colston Burrell, Judith Knott Tyler
C.D. Paris
C.E. Lucas Phillips, Peter N. Barber
C.H. Phetteplace
CCL, RF
Chamberlain, Cox og mange flere
Charles Lyte
Christopher Grey-Wilson
Christopher Grey-Wilson, Phillip Cribb
Clarence Barrett
Claus Dalby
Clemant Gray Bowers
Constantine N. Goulimis, Niki A. Goulandris
Cor Verboom
Cowan, Davidian
Cox
D. M. van Gelderen, P. C. de Jong, H. J. Oterdoom
D. Schwartz
D.E. Mayers
D.M van Gelderen, J.R.P. van Hoey Smith
Dansk Dendrologisk Forening
Dansk Pæon Selskab
Dansk Primula Klub
David Farr, H. Bartolome Esteban, Mary E. Palm
David Lang
David Leach
David Small, Ella May T. Wulff
Den Alpine Have - Danmark, The alpine garden society
Den Norske Rhododendronforening
Deutsche Rhododendron-Gesellschaft
Diana Grenfell, Michael Shadrack
Dorothy J. Callaway
Dorothy Mierow, Shrestha Tirtha Bahadur
Douglas Bartrum
DRG
E.H. Wilson
E.H.M Cox
E.H.M Cox, Peter A. Cox
Edited by James L. Luteyn
Editor: Meldon Kraxberger
Erhard Moser
Evald Burgaard
F. Doleshy
Fang Wenpei
Feng Guomei
Feng Guomei, Yang Zenghong
Feng Kuo-Mei
Flemmming Hansen
Forskellige
Francoise Pommeret, Ellen Buch-Hansen
Frank Kingdon-Ward
Fred C. Galle
Frederick Street
Frederick W Case, Jr.,Roberta B. Case
Fritz Köhlein
G. Argent, A. Lamb,A. Phillipps, S. Collenette
G.R. Wakefield
Garmin
Georg Argent, Gillian Fairweather, Kerry Walter
Georg Argent,John Bond,David Chamberlain, Peter Cox, Allan Hardy
Georg Sand
George Argent, Anthony Lamb, Anthea Phillipps
George Argent, Marjory McFarlane
George Sfikas
Gerd Krüssman
Glyn Church, Graham Smith
Guan Kaiyun, Zhou Zhekun, Sun Hang, Fei Yong, Sun Weibang
Gunnar Gilberg
Guy Gusman, Liliane Gusman
H. Edward Reiley
H. H. Davidian
H. P. Sleumer
H. Sleumer
H. T. Hartmann
H. Tod
Hälsingborgs Trädgårdsförening
Harold E. Greer
Harold R. Fletcher
Havebrugshistorisk Selskab
Henry Kock
Homer A. Salley
Homer E. Salley
Homer Salley, Harold E. Greer
Huang Zhaoxian
Hugo Lykke
I.F. La Croix
Irina Goldberg
Ito Ihei
J. Batta
J. Harold Clarke
J. Jenssen
J.B. Stevenson
J.Berg, G. Kreussmann
J.C. Birck, Sv.Å.Askjær, Tue Jørgensen
J.D. Vertrees
J.D.A. Stainton
James Cullen
Jane Brown
Jane Taylor
Jeff Collman
Jennifer Trehane
Jenny Linford
Jim Gardiner
Jim Jermyn
Jim Rolfe
Jochen Mönch, Hartwig Schepker
Johan Berg, Lothar Heft
Johan Lange
Johannes Hedegaard
John Brookes
John Moscoso
John Street
Jørgen Halse, Jan Brodersen
Jørn Dannesboe
Judith Berrisford
Judy Young
Judy Young, Lu-sheng Chong
K.C. Pradhan
Katsuhiko Mizuno
Kenneth N.E. Cox
Kenneth N.E. Cox, Raoul Curtis-Machin
Kenzo Okawa
Keshab C. Pradhan, Ed. Clive Justice
Kevin Pratt, Michael Jefferson-Brown
Kirsten Lindqvist
Kirstin Nørgaard Pedersen
Kiyoshi Seike, Masanobu Kudo, David H.Engel
Kjeld Slot
Klaus Hansen
Knud
Kofranek, Larson
L. Clarence Towe
Lena Månsson, Bertil K. Johanson
Lesley Young
Lis Langschwager
Lisa Winnerlid
Lothar Heft
M. N. Philipson, W.R. Philipson
Magnus Gammelgård
Malcolm McGregor
Marianna Kneller
McQuire, Robinson
Mendocino Coast film, Botanical Garden
Mervyn Kessell
Michael Boulter
Michelle Sitzer, Chuan Cao, Benjamin Hall
Ministry of Forrest department of Medical Plants
N.K. Gould, P.M. Synge editors
New Zealand Rhododendron Association Inc.
Niels Jensen
Niels Skjøldberg
O. Burchards
OASE
Ole Jonny Larsen
Ole Sønderhousen
Oleg Polunin, Adam Stainton
Olympus
P. Chr. Nielsen
P.G. Jordan
P.M Synge, J.W.O. Platt-editors
P.M. Synge, editor
Pat Halliday
Patricia Jonas
Paula Kohlhaupt
Per M. Jørgensen
Peter A. Cox
Peter A. Cox, Kenneth N.E. Cox
Peter A. Cox, Peter Hutchison
Peter Cox, Kenneth Cox
Philip A.Livingston, Franklin .H.West
Phillip Cribb
R. Farrer
Rajesh Verma
Ray Delmond
RCMG
Rebecca Pradhan
Rhododendron Group, Royal Horticultural Society
Rhododendron Species Foundation
Rhododendron, Camelias and Magnolia Group
Rhododendron, Camellia & Magnolia Group
Rhododendronforeningen
Rhododendronforeningens medlemmer
Rhododendronkredsen
RHS
Richard A. Jaynes
Richard Milne
Roger Phillips, Martyn Rix
Roy Lancaster
Roy Strong
Royal Botanical Garden, Edinburgh
Royal Horticultural Society
RSF
Rüdiger Scheid, Lene Scheid
Sasuke Nakao & Keiji Nishioka
Seamus O'Brian
Sonja Nelson
Sonja Nelson, ARS Portland Chapter
Species Foundation
Stan Armington
Steffen Munck-Hansen
Susanna Widlundh
Svend Aage Askjær
Svenska Rhodosällskapet
Sydsvenska Rhododendron Sällskapet
T. Nitzelius
T. Nitzelius, G. Nitzelius
Ted van Veen
Th. Foersom, Finn O.Kapel, Ole Svarre
The American Phytopathological Society
The American Rhododendron Society
The Pacific Rhododendron Society
The Scottish Rhododendron Society
Udai C. Pradhan, Satyam C. Pradhan
Udai C. Pradhan, Sonam T. Lachungpa
Udai Pradhan
Ukendt
Ukendt ( står på kinesisk)
ukendte
Val Bourne
W.R Phillipson, M.N Philipson, W.S. Judd & K.A. Kron
Walter Schmalscheidt
Wang Bingning
Wu Quanan, chiefeditor
Wu Zhengyi
Xu Zhihui
Xu Zhihui, chiefeditor
Yoko Kawaguchi
B0175 – Hellebores A Comprehensive Guide