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- 31025635 contributor B779045.
- 31025635 created "1931.".
- 31025635 date "1931".
- 31025635 date "1931.".
- 31025635 dateCopyrighted "1931.".
- 31025635 description "Thesis (Ph. D.)--University of Pennsylvania, 1930.".
- 31025635 extent "[1], 1252-1262 p.".
- 31025635 issued "1931".
- 31025635 issued "1931.".
- 31025635 language "eng".
- 31025635 publisher "Philadelphia,".
- 31025635 subject "535.84".
- 31025635 subject "Helium.".
- 31025635 subject "QC462.H4 R3 1930".
- 31025635 subject "Spectrum analysis.".
- 31025635 title "A direct measurement of the intensity variations of the helium lines with voltage [by] Joseph Razek.".
- 31025635 type "text".