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- catalog contributor b6720871.
- catalog created "1936.".
- catalog date "1936".
- catalog date "1936.".
- catalog dateCopyrighted "1936.".
- catalog description "Thesis (SC.D)--University of Pennsylvania, 1937.".
- catalog extent "1 p. ℓ., p. 1095-1139.".
- catalog issued "1936".
- catalog issued "1936.".
- catalog language "eng".
- catalog publisher "Philadelphia,".
- catalog subject "535".
- catalog subject "Cathode ray tubes.".
- catalog subject "Electron optics.".
- catalog subject "QC544.C3 E7 1937".
- catalog title "Electron optical system of two cylinders as applied to cathode ray tubes [by] David William Epstein.".
- catalog type "text".