by West Virginia University. College of Agriculture. Extension Department

1913

by Purdue University. Dept. of Engineering Extension

1930

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

1891

by State University of Iowa

1922

by Ohio State University. Cooperative Extension Service

1921

by University of Illinois. High school visitor

1922

by Columbia University. Teachers College

1927

by National University Extension Association

1923

by National University Extension Association

1922

by University of North Carolina (1793-1962). University Extension Division

1927

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

1918

by Michigan State University. Agricultural Experiment Station

1916