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- 31012201 contributor B771160.
- 31012201 created "1930.".
- 31012201 date "1930".
- 31012201 date "1930.".
- 31012201 dateCopyrighted "1930.".
- 31012201 description "Thesis (Ph. D.)--Columbia university, 1930.".
- 31012201 extent "45 p.".
- 31012201 issued "1930".
- 31012201 issued "1930.".
- 31012201 language "eng".
- 31012201 publisher "New York, N.Y.,".
- 31012201 subject "537.53".
- 31012201 subject "Photoelectric cells.".
- 31012201 subject "QC715 .O6 1930".
- 31012201 title "Method of enhancing the sensitiveness of alkali metal photoelectric cells, by Albert Ray Olpin ...".
- 31012201 type "text".