31. Number 50 - The Relative Growth-Promoting Value of the Protein of Coconut Oil Meal, and of Combinations of it with Protein from Various Other Feeding Stuffs: Memoir Collection: Core Historical Literature of Agriculture Publisher: Cornell University, Agricultural Experiment Station Publication Place: Ithaca, N.Y. Date: 1921 Format: Issue
32. Number 51 - The Hog Louse, Haematopinus Suis Linne: Memoir Collection: Core Historical Literature of Agriculture Publisher: Cornell University, Agricultural Experiment Station Publication Place: Ithaca, N.Y. Date: 1921 Format: Issue
33. Number 484: Bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State Agricultural Experiment Station Publication Place: Geneva, N.Y. Date: 1921 Format: Issue
34. Number 485: Bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State Agricultural Experiment Station Publication Place: Geneva, N.Y. Date: 1921 Format: Issue
35. Number 486: Bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State Agricultural Experiment Station Publication Place: Geneva, N.Y. Date: 1921 Format: Issue
36. Number 487: Bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State Agricultural Experiment Station Publication Place: Geneva, N.Y. Date: 1921 Format: Issue
37. Number 487, Edition popular: Bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State Agricultural Experiment Station Publication Place: Geneva, N.Y. Date: 1921 Format: Issue
38. Number 488: Bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State Agricultural Experiment Station Publication Place: Geneva, N.Y. Date: 1921 Format: Issue
39. Number 488, Edition popular: Bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State Agricultural Experiment Station Publication Place: Geneva, N.Y. Date: 1921 Format: Issue
40. Number 489: Bulletin Collection: Core Historical Literature of Agriculture Publisher: New York State Agricultural Experiment Station Publication Place: Geneva, N.Y. Date: 1921 Format: Issue