Lighting poultry houses
Lucas, L.M., Campbell, L.E.
Lighting poultry houses - Washington 1967 - 1-12 p. - Poultry United States Department of Agriculture. Farmers Bulletin No. 2229 .
Lighting poultry houses - Washington 1967 - 1-12 p. - Poultry United States Department of Agriculture. Farmers Bulletin No. 2229 .