Decker, J. W. (1903). Elements of dairying. The author.
Dyfyniad Arddull ChicagoDecker, John Wright. Elements of Dairying. Columbus, O.: The author, 1903.
Dyfyniad MLADecker, John Wright. Elements of Dairying. The author, 1903.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.