Omafra, 2009. In: Chris Brown (Ed.), Agronomy guide for field crops, Publication 811, OMAFRA, Ontario Ministry of Agriculture and Food

OMAFRA, 2009. Agronomy guide for field crops : Chapter 2, Soybeans. In: Chris Brown (Ed.), Agronomy guide for field crops, Publication 811, OMAFRA, Ontario Ministry of Agriculture and Food