Kenneth Spencer Research Library Archival Collections
Part of the University of Kansas. Kenneth Spencer Research Library Repository
ExxonMobil - U.S.S.R. Postcard Books, Box: 48, Folder: 6. Martha Peterson papers, RH MS 953. University of Kansas. Kenneth Spencer Research Library.
ExxonMobil - U.S.S.R. Postcard Books, Box: 48, Folder: 6. Martha Peterson papers, RH MS 953. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/111589 Accessed December 25, 2025.
