1. West African forests and forestry Creator: Unwin, Arthur Harold. Collection: Core Historical Literature of Agriculture Publisher: T.F. Unwin, ltd., Publication Place: London : Date: 1920 Format: Book
2. Weeds of farm land Creator: Brenchley, Winifred Elsie, 1883- Collection: Core Historical Literature of Agriculture Publisher: Longmans, Green and co., Publication Place: London : Date: 1920 Format: Book
3. Volume 46, Number 4: Transactions of the American Entomological Society Collection: Core Historical Literature of Agriculture Publisher: American Entomological Society Publication Place: Philadelphia Date: 1920 Format: Issue
4. Volume 46, Number 3: Transactions of the American Entomological Society Collection: Core Historical Literature of Agriculture Publisher: American Entomological Society Publication Place: Philadelphia Date: 1920 Format: Issue
5. Volume 46, Number 2: Transactions of the American Entomological Society Collection: Core Historical Literature of Agriculture Publisher: American Entomological Society Publication Place: Philadelphia Date: 1920 Format: Issue
6. Volume 46, Number 1: Transactions of the American Entomological Society Collection: Core Historical Literature of Agriculture Publisher: American Entomological Society Publication Place: Philadelphia Date: 1920 Format: Issue
7. 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
8. 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
9. 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
10. 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