Chicago Natural History Museum. (1944). Report of the Director to the Board of Trustees for the year ... The Museum.
Chicago-viite (17. p.)Chicago Natural History Museum. Report of the Director to the Board of Trustees for the Year ... [Chicago]: The Museum, 1944.
MLA-viite (8. p.)Chicago Natural History Museum. Report of the Director to the Board of Trustees for the Year ... The Museum, 1944.
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