Não informado. (1955). Commercial fertilizer and plant food industry. W.W. Brown Publishing.
Chicago-Zitierstil (17. Ausg.)Não informado. Commercial Fertilizer and Plant Food Industry. Atlanta, Ga: W.W. Brown Publishing, 1955.
MLA-Zitierstil (8. Ausg.)Não informado. Commercial Fertilizer and Plant Food Industry. W.W. Brown Publishing, 1955.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.