BOGART, R. (1977). Scientific farm animal production - Ralph Bogart. Burgens Publ. Company.
Dyfyniad Arddull ChicagoBOGART, Ralph. Scientific Farm Animal Production - Ralph Bogart. Burgens Publ. Company, 1977.
Dyfyniad MLABOGART, Ralph. Scientific Farm Animal Production - Ralph Bogart. Burgens Publ. Company, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.