Author
United States. National Archives and Records Service
United States. Census Office. 6th Census, 1840
10
United States. Federal Extension Service
8
Texas Agricultural Extension Service
4
United States. Census Office. 6th census, 1840
4
Washington State Library
2
Brigham, Joseph H.
1
Dabney, Charles William, 1855-1945
1
Galloway, B. T., 1863-1938
1
Hays, W. M. (Willet Martin), 1859-1916
1
Michigan State University
1
United States. Bureau of Agricultural Economics
1
United States. Bureau of the Census
1
United States. Department of Agriculture
1
United States. Department of Agriculture. Office of the Secretary
1
United States. Extension Service
1
Vrooman, Carl Schurz, 1872-1966
1
Willits, Mr. (Edwin), 1830-1896
1
Wiser, Vivian D.
1