Report of the Director to the Board of Trustees for the year ... / Chicago Natural History Museum.

1950

Report of the Director to the Board of Trustees for the year ... / Chicago Natural History Museum.

1944

Report of the Director to the Board of Trustees for the year ... / Chicago Natural History Museum.

1954

Report of the Director to the Board of Trustees for the year ... / Chicago Natural History Museum.

1956

Report of the Director to the Board of Trustees for the year ... / Chicago Natural History Museum.

1943

Report of the Director to the Board of Trustees for the year ... / Chicago Natural History Museum.

1948

Report of the Director to the Board of Trustees for the year ... / Chicago Natural History Museum.

1957

Report of the Director to the Board of Trustees for the year ... / Chicago Natural History Museum.

1945

Report of the Director to the Board of Trustees for the year ... / Chicago Natural History Museum.

1947

Report of the Director to the Board of Trustees for the year ... / Chicago Natural History Museum.

1955

Report of the Director to the Board of Trustees for the year ... / Chicago Natural History Museum.

1946

Report of the Director to the Board of Trustees for the year ... / Chicago Natural History Museum.

1963

Report of the Director to the Board of Trustees for the year ... / Chicago Natural History Museum.

1961

Occasional papers of the Museum of Natural History, the University of Kansas.

no.20 (1973)

Occasional papers of the Museum of Natural History, the University of Kansas.

no.18 (1973)