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An examination of earnings in certain standard machine-tool occupations in Philadelphia

(Thesis (Ph. D.)--University of Pennsylvania, 1929.).

Identiferoai:union.ndltd.org:OCLC/oai:xtcat.oclc.org:OCLCNo/590153184
Date January 1929
CreatorsFrain, Hummel La Rue.
PublisherPhiladelphia, Univ. of Pennsylvania pr.,
Source SetsOCLC
LanguageEnglish
Detected LanguageEnglish

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