Sigma Xi, the Scientific Research Society.
Sigma Xi correspondence of the treasurer, George B. Pegram, 1940-1942.
Correspondence of the Sigma Xi treasurer, George B. Pegram.
Pegram, George Braxton, 1876-1958.
Sigma Xi, the Scientific Research Society
Science -- Societies, etc.
AIP-ICOS
American Institute of Physics. Niels Bohr Library & Archives. One Physics Ellipse, College Park, MD 20740, USA