by University of Idaho. College of Agriculture. Extension Division

1912

by University of Oklahoma. Extension Division

1927

by University of Chicago

1903

by University of Chicago

1903

by Kansas State University. Division of College Extension

1921

by University of the State of New York

1897

by University of the State of New York. Division of Educational Extension

1903

by University of Illinois (Urbana-Champaign campus). Extension Service in Agriculture and Home Economics

1916

by Purdue University. Department of Agricultural Extension

1928

by Kansas. State University of Agriculture and Applied Science, Manhattan. Division of College Extension

1918