Annual report of the board of regents of the Smithsonian Institution :
Smithsonian Institution
Annual report of the board of regents of the Smithsonian Institution : Showing the Operations, Expenditures and Condition of the Institution for the Year ended June 30 1947. - Washington, D.C. : Government Printing Office, 1948. - 471 p. - Smithsonian Institution. Publication 3921 .
Science--Bulletin
Annual report of the board of regents of the Smithsonian Institution : Showing the Operations, Expenditures and Condition of the Institution for the Year ended June 30 1947. - Washington, D.C. : Government Printing Office, 1948. - 471 p. - Smithsonian Institution. Publication 3921 .
Science--Bulletin