11. Volume 11, Number 11: Extension Service news Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture, Cornell University Publication Place: Ithaca, N.Y. Date: 1928 Format: Issue
12. Volume 11, Number 12: Extension Service news Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture, Cornell University Publication Place: Ithaca, N.Y. Date: 1928 Format: Issue