Selecting hens for egg production
Quinn, J.P.
Selecting hens for egg production - Washington 1934 - 1-18 p. - Hen, Egg, Production United States Department of Agriculture. Farmers Bulletin No. 1727 .
Selecting hens for egg production - Washington 1934 - 1-18 p. - Hen, Egg, Production United States Department of Agriculture. Farmers Bulletin No. 1727 .