G H Schmidt & L D Van Vleck. (1931). Principles of dairy science. San Francisco.
Dyfyniad Arddull ChicagoG H Schmidt and L D Van Vleck. Principles of Dairy Science. San Francisco, 1931.
Dyfyniad MLAG H Schmidt and L D Van Vleck. Principles of Dairy Science. San Francisco, 1931.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.