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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

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

Frain, Hummel La Rue. January 1929 (has links)
(Thesis (Ph. D.)--University of Pennsylvania, 1929.).

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