41. Number 490: Bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State Agricultural Experiment Station Publication Place: Geneva, N.Y. Date: 1921 Format: Issue
42. Edition fortieth annual report: Bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State Agricultural Experiment Station Publication Place: Geneva, N.Y. Date: 1921 Format: Issue
43. Number 159 - Forest Planting on the Farm: Cornell reading course for the farm Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1921 Format: Issue
44. Number 159, Supplement - Forest Planting on the Farm. Discussion Paper: Cornell reading course for the farm Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1921 Format: Issue
45. Number 160 - Harness Repairing: Cornell reading course for the farm Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1921 Format: Issue
46. Number 160, Supplement - Harness Repairing. Discussion Paper: Cornell reading course for the farm Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1921 Format: Issue
47. Number 161 - Diseases Interfering with Reproduction in Cattle: Cornell reading course for the farm Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1921 Format: Issue
48. Number 161, Supplement - Diseases Interfering with Reproduction in Cattle. Discussion Paper: Cornell reading course for the farm Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1921 Format: Issue
49. Volume 4, Number 1: Extension Service news Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture, Cornell University Publication Place: Ithaca, N.Y. Date: 1921 Format: Issue
50. Volume 4, Number 2: Extension Service news Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture, Cornell University Publication Place: Ithaca, N.Y. Date: 1921 Format: Issue