by University of Kentucky

1917

by University of California (System)

1912

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

1972

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

1920

by Washington State University

1911

by University of California (System)

1965

by Johns Hopkins University. Peabody Institute. Library, George Peabody Library

1904

by University of New Hampshire. Agricultural Extension Service

1912

by University of Northern Colorado

1918

by University of Arizona

1911

by University of California (System). University Extension

1926

by University of California, Berkeley

1922