Author
Daniels, Gilbert S.
3
Epp, Michael E.
3
Krüssmann, Gerd
3
Post, George E.
3
The American Horticultural Society
3
Bailey, Ethel Zoe
2
Bailey, L. H.
2
Coode, M. J. E.
2
Cullen, J.
2
Davis, P. H.
2
Dinsmore, John Edward
2
Brown, Martin F.
1
Hitchcock, A. S.
1
Karagöz, Alptekin
1
Merrill, Elmer Drew
1
Ministry of Agriculture and Forestry
1
Muminjanov, Hafiz
1
Sauer, Jonathan D.
1
Takhtajan, Armen
1
United States Government Printing Office
1
Verdoorn, Frans
1