Great Britain.
Bill Bryson
Gervase Markham
Étienne Gilson
United States. Agricultural Research Service
Ministry of Agriculture, Fisheries and Food
Christiaan Huygens
Richard Rhodes
Lierre Keith
Brett Page
Dadd, George H.
William Youatt
A. David Weaver
United States. Bureau of Animal Industry
L. P. McCann
A. D. Barth
J. W. Bailey
George T Howland