Author
Universität München
15
Florida State Poultry Producers Association
10
Sveriges lantbruksuniversitet
10
Justus Liebig-Universität Giessen
9
Universität Leipzig (1409-1953)
8
Florida Federation of Record of Performance Breeders
6
Florida Hatchery and Breeders Association
6
Pennsylvania State Poultry Association
6
Universität Bonn
6
American Poultry Association
5
Halbert, Marie Goodwin
5
Lewis, Harry Reynolds, 1885-
5
Tierärztliche Hochschule Hannover
5
University of Kentucky. Bureau of School Service
5
Universität Göttingen
5
Bolotnikov, I. A.
4
Eidgenössische Technische Hochschule Zürich
4
Florida Dairy Industry Association
4
Florida Turkey Federation
4
Iowa State College. Extension Service
4
Rijksuniversiteit te Utrecht
4
American Buff Plymouth Rock Club
3
Ecole nationale vétérinaire d'Alfort
3
International Baby Chick Association
3
Landbouwuniversiteit Wageningen
3
Landwirtschaftliche Hochschule Hohenheim
3
Pennsylvania Egg Marketing Association
3
Pennsylvania Poultry Federation
3
Université de Paris
3
Veterinärhögskolan (Stockholm, Sweden)
3
Washington Co-operative Egg and Poultry Association
3
American Poultry & Hatchery Federation
2
Assam (India). Directorate of Evaluation
2
Axelsson, Joel
2
Bennett, John C.
2
Dickinson, Sherman, 1891-
2
Florida Egg and Poultry Council
2
Florida Poultry Council
2
Gregory, R. W. (Raymond William), b. 1893
2
Harper Adams Agricultural College
2
Institute of American Poultry Industries
2
Jull, Morley A. (Morley Allan), 1885-1959
2
Konopatov, ︠I︡U. V (︠I︡Uriĭ Vasilʹevich)
2
Kushner, Kh. F. (Khil︠i︡a Faĭvelovich)
2
Königliche tierärztliche Hochschule zu Berlin
2
Københavns universitet
2
Landbouwhogeschool Wageningen
2
Lindgren, Nils Olof
2
Maryland State Poultry Council
2
Mehrhof, N. R. (Norman Ripley), b. 1899
2
more ...