25. Volume 1950-1967, Index : Cornell recommends for field crops Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1967 Format: Issue
26. Volume 1968: Cornell recommends for field crops Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1968 Format: Issue
27. Volume 1969: Cornell recommends for field crops Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1969 Format: Issue
28. Volume 1971: Cornell recommends for field crops Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1971 Format: Issue