1. Pigs: breeds and management. Creator: Spencer, Sanders, b. 1840. Collection: Core Historical Literature of Agriculture Publisher: Vinton, Publication Place: London : Date: 1905 Format: Book
2. The pig: breeding, rearing, and marketing Creator: Spencer, Sanders, b. 1840. Collection: Core Historical Literature of Agriculture Publisher: C. A. Pearson, Ltd., Publication Place: London : Date: 1919 Format: Book