by Colorado. State Planning Division

1924

by Colorado. State Board of Agriculture

1922

by Colorado. State Planning Commission

1923

by Colorado. State Forester

1912

by Colorado. General Assembly. Senate

1909

by Gustav A. Swanson, Colorado State University. Department of Fishery and Wildlife Biology

1969

by Colorado State College (Fort Collins, Colo.)

1915

by Colorado

1974

by Colorado. State Board of Land Commissioners

1929

by Colorado State University

1919

by Colorado. Office of the State Engineer

1920

by Colorado Society of Engineers

1925