by Michigan. State University of Agriculture and Applied Science (East Lansing). Extension Service

1925

by University of Chattanooga

1923

by University of California, Berkeley

1928

by University of California (System)

1926

by California. University, University of California, Berkeley

1924

by University of California, Berkeley

1924

by University of California, Berkeley

1924

by State University of Iowa

1920

by University of the State of New York

1900

by Johns Hopkins University

1915

by University of Michigan

1993 · UM Libraries

by University of Chicago

1917