21. Volume 20, Number 3: Annals of the Entomological Society of America Collection: Core Historical Literature of Agriculture Publisher: Entomological Society of America Publication Place: Lanham, Md. Date: 1927 Format: Issue
22. Volume 20, Number 4: Annals of the Entomological Society of America Collection: Core Historical Literature of Agriculture Publisher: Entomological Society of America Publication Place: Lanham, Md. Date: 1927 Format: Issue
23. Volume 1, Number 1: Agricultural history Collection: Core Historical Literature of Agriculture Publisher: Agricultural History Society Publication Place: Fargo, N.D. Date: 1927 Format: Issue
24. Volume 1, Number 2: Agricultural history Collection: Core Historical Literature of Agriculture Publisher: Agricultural History Society Publication Place: Fargo, N.D. Date: 1927 Format: Issue
25. Number 41: Farm economics Collection: Core Historical Literature of Agriculture Publisher: Cornell University. N.Y. State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1927 Format: Issue
26. Number 42: Farm economics Collection: Core Historical Literature of Agriculture Publisher: Cornell University. N.Y. State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1927 Format: Issue
27. Number 43: Farm economics Collection: Core Historical Literature of Agriculture Publisher: Cornell University. N.Y. State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1927 Format: Issue
28. Number 44: Farm economics Collection: Core Historical Literature of Agriculture Publisher: Cornell University. N.Y. State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1927 Format: Issue
29. Number 45: Farm economics Collection: Core Historical Literature of Agriculture Publisher: Cornell University. N.Y. State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1927 Format: Issue
30. Number 46: Farm economics Collection: Core Historical Literature of Agriculture Publisher: Cornell University. N.Y. State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1927 Format: Issue