by University of Nebraska--Lincoln. College of Agriculture

1900

by Ohio State University. College of Agriculture. Extension Service

1918

by Kansas State Agricultural College, Kansas State College of Agriculture and Applied Science, Kansas State University

1922

by Oregon State University. Agricultural Experiment Station

1900

by Oregon State University. Agricultural Experiment Station

1900

by Ohio State University

1910

by Boston University

1889

by University of Missouri. Agricultural Extension Service

1926

by Washington State University. Library

1916

by University of California (1868-1952). College of Agriculture

1914

by Ohio State University. Center for Vocational and Technical Education, United States. Office of Education

1972

by Cornell University

1905