21. Number 819: Bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State Agricultural Experiment Station Publication Place: Geneva, N.Y. Date: 1968 Format: Issue
22. Number 820: Bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State Agricultural Experiment Station Publication Place: Geneva, N.Y. Date: 1968 Format: Issue
23. Number 821: Bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State Agricultural Experiment Station Publication Place: Geneva, N.Y. Date: 1968 Format: Issue
24. Number 822: Bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State Agricultural Experiment Station Publication Place: Geneva, N.Y. Date: 1968 Format: Issue
25. Number 1020: Bulletin Collection: Core Historical Literature of Agriculture Publisher: Cornell University Agricultural Experiment Station, New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1968 Format: Issue
26. Number 1021: Bulletin Collection: Core Historical Literature of Agriculture Publisher: Cornell University Agricultural Experiment Station, New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1968 Format: Issue
27. Number 1074, Edition Reprint - Growing Cucumbers, Melons, and Squash in New York State: Cornell extension bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1968 Format: Issue
28. Number 1080, Edition Revised - Shaping Christmas Trees for Quality: Cornell extension bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1968 Format: Issue
29. Number 1195 - The Economics of Poultry Manure Disposal, Based on a Study in Sullivan County and Western Ulster County, New York, 1966: Cornell extension bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1968 Format: Issue
30. Number 1198 - Growing Trees in Small Nurseries: Cornell extension bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1968 Format: Issue