Ptak, Roger Leon.
Roger Leon Ptak papers, 1967.
Collection includes vertical file papers and photographs.
American astrophysicist. Ph.D. physics, Cornell University (1966). Professional experience includes: assistant professor of physics (1966-1968).
Ptak, Roger Leon.
AIP-ICOS
DePauw University. Archives of DePauw University and Indiana United Methodism. Roy O. West Library. Greencastle, IN 46135, USA