by Colorado Agricultural Experiment Station

1896

by Colorado Education Association

1922

by Colorado Agricultural Experiment Station

1918

by State Historical and Natural History Society of Colorado

1927

by Colorado State University. Extension Service

1920

by University of Colorado

1928

by Colorado Society of Engineers

1929

by University of Colorado (Boulder campus)

1921

by Colorado. Attorney-General's Office

1929

by United States Commission on Civil Rights. Colorado Advisory Committee

1983

by University of Northern Colorado

1925

by Colorado. Dept. of Public Instruction

1902