by U.S. Fish and Wildlife Service

1967

by U.S. Fish and Wildlife Service

1951

by U.S. Fish and Wildlife Service. Division of Cooperative Units

1983

by U.S. Fish and Wildlife Service

1964

by Communicable Disease Center (U.S.) Technology Branch

1961

by Alaska Agricultural Experiment Stations (U.S.).

1902

by U.S. Fish and Wildlife Service

1914

by National Zoological Park (U.S.)

1921

by Communicable Disease Center (U.S.)

1946

by Communicable Disease Center (U.S.) Technology Branch

1958

by Democratic National Committee (U.S.).

1956