41. Volume 4, Number 6: Plant world Collection: Core Historical Literature of Agriculture Publisher: Plant World Association Publication Place: Baltimore, Md. Date: 1901 Format: Issue
42. Volume 4, Number 7: Plant world Collection: Core Historical Literature of Agriculture Publisher: Plant World Association Publication Place: Baltimore, Md. Date: 1901 Format: Issue
43. Volume 4, Number 8: Plant world Collection: Core Historical Literature of Agriculture Publisher: Plant World Association Publication Place: Baltimore, Md. Date: 1901 Format: Issue
44. Volume 4, Number 9: Plant world Collection: Core Historical Literature of Agriculture Publisher: Plant World Association Publication Place: Baltimore, Md. Date: 1901 Format: Issue
45. Volume 4, Number 10: Plant world Collection: Core Historical Literature of Agriculture Publisher: Plant World Association Publication Place: Baltimore, Md. Date: 1901 Format: Issue
46. Volume 4, Number 11: Plant world Collection: Core Historical Literature of Agriculture Publisher: Plant World Association Publication Place: Baltimore, Md. Date: 1901 Format: Issue
47. Volume 4, Number 12: Plant world Collection: Core Historical Literature of Agriculture Publisher: Plant World Association Publication Place: Baltimore, Md. Date: 1901 Format: Issue
48. Series 1, Number 3 - Fertility of the Soil: Cornell reading-course for farmers Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1901 Format: Issue
49. Series 1, Number 3, Supplement - Discussion-Paper on Farmers' Reading-Course Bulletin No. 3: Cornell reading-course for farmers Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1901 Format: Issue
50. Series 1, Number 4 - How the Plant Gets Its Food From the Soil: Cornell reading-course for farmers Collection: Core Historical Literature of Agriculture Publisher: New York State College of Agriculture Publication Place: Ithaca, N.Y. Date: 1901 Format: Issue
