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A history of agricultural experimentation and research in the United States, 1607-1925
Alfred Charles True1937

A history of agricultural experimentation and research in the United States. 1620-1925
Alfred Charles True1929

A report on the work and expenditures of the agricultural experiment stations for the year ended June 30, 1897
Alfred Charles True1898

A report on the work and expenditures of the agricultural experiment stations for the year ended June 30, 1898
Alfred Charles True1899

A report on the work and expenditures of the agricultural experiment stations for the year ended June 30, 1900
Alfred Charles True1901
![A history of agricultural extension work in the United States, 1785-1923 1928 [Leather Bound]](https://covers.openlibrary.org/b/id/8768172-M.jpg#w=1280)
A history of agricultural extension work in the United States, 1785-1923 1928 [Leather Bound]
Alfred Charles True2019