Dairy herd
Alvord, H.E.
Dairy herd Its formation and management - Washington 1897 - 1-24 p. - Dairy, Management United States Department of Agriculture. Farmers Bulletin No. 55 .
Dairy herd Its formation and management - Washington 1897 - 1-24 p. - Dairy, Management United States Department of Agriculture. Farmers Bulletin No. 55 .