American Horticultural Society
(1)
American Horticultural Society (COR)
(1)
American Horticultural Society (COR)/ Peter Anderson (PHT)/ Alan Toogood (EDT)
(1)
Christopher Brickell (EDT)
(1)
Christopher Brickell (EDT)/ Marc Cathey (EDT)/ Joyce Fingerut (CON)/ Alan A. Fisher (CON)/ Brent Heath (CON)/ Judith Jones (CON)/ Richard M. Koogle (CON)/ Anthony Liberta Ph.D. (CON)/ Ludwig,
(1)
Christopher Brickell (EDT)/ Trevor J. Cole (EDT)/ American Horticultural Society (COR)
(1)
Christopher Brickell/ David Joyce
(1)
Inc. Dorling Kindersley (COR)
(1)
Michiko Young/ David Young/ Ben Simmons (PHT)/ Keystone (PHT)/ Tan Hong Yew (ILT)
(1)
Pennsylvania Horticultural Society (COR)/ Janet Evans (EDT)/ Drew Becher (FRW)/ Sam Lemheney (INT)
(1)
The American Horticultural Society
(1)
Thomas S. Spencer/ John J. Russell
(1)