1. Parity, parity, parity Creator: Black, John D. 1883-1960. Collection: Core Historical Literature of Agriculture Publisher: The Harvard Committee on Research in the Social Sciences, Publication Place: Cambridge, Mass. : Date: 1942 Format: Book
2. Food enough Creator: Black, John D. 1883-1960. Collection: Core Historical Literature of Agriculture Publisher: The Jaques Cattell Press, Publication Place: Lancaster, Pa. : Date: 1943 Format: Book