by University of Nebraska (Lincoln campus) Extension division

1928

by University of Nebraska (Lincoln campus). Libraries

1926

by University of Illinois (Urbana-Champaign campus). Bureau of Educational Research

1930

by University of Nebraska (Lincoln campus). Agricultural Experiment Station

1925

by University of Nebraska (Lincoln campus). Bureau of Business Research

1922

by University of Nebraska (Lincoln campus). Conservation and Survey Division

1923

by University of Nebraska (Lincoln campus). Teachers College

1924