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  1. 1

    Philadelphia workers in a changing economy . por Palmer, Gladys Louise

    Publicado em 1956
    Livro

    Philadelphia workers in a changing economy .
  2. 2

    Four years of labor mobility; a study of labor turnover in a group of selected plants in Philadelph, 1921-1924.

    Publicado em 1925
    Livro

    Four years of labor mobility; a study of labor turnover in a group of selected plants in Philadelph, 1921-1924.

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