61. Volume 3, Number 6: Extension Service news Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture, Cornell University Publication Place: Ithaca, N.Y. Date: 1920 Format: Issue
62. Volume 3, Number 7: Extension Service news Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture, Cornell University Publication Place: Ithaca, N.Y. Date: 1920 Format: Issue
63. Volume 3, Number 8: Extension Service news Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture, Cornell University Publication Place: Ithaca, N.Y. Date: 1920 Format: Issue
64. Volume 3, Number 9: Extension Service news Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture, Cornell University Publication Place: Ithaca, N.Y. Date: 1920 Format: Issue
65. Volume 3, Number 10: Extension Service news Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture, Cornell University Publication Place: Ithaca, N.Y. Date: 1920 Format: Issue
66. Volume 3, 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: 1920 Format: Issue
67. Volume 3, 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: 1920 Format: Issue
68. Vol. 79, No. 4567, January 3, 1920 - No. 4618, December 25, 1920: Rural New Yorker Collection: Core Historical Literature of Agriculture Publisher: Rural Publishing Co. Publication Place: New York Date: 1920 Format: Issue
69. Volume 2, Number 1: Journal of farm economics Collection: Core Historical Literature of Agriculture Publisher: American Farm Economic Association Publication Place: Menasha, Wis. Date: 1920 Format: Issue
70. Volume 2, Number 2: Journal of farm economics Collection: Core Historical Literature of Agriculture Publisher: American Farm Economic Association Publication Place: Menasha, Wis. Date: 1920 Format: Issue