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＜図書＞
Philadelphia unemployment, with special reference to the textile industries : a report / by Joseph H. Willits.

出版者	Philadelphia : Department of Public Works
出版年	1915
大きさ	170 p. : ill. ; 23 cm.
著者標目	Willits, Joseph Henry, 1889-
件　名	Unemployed -- Philadelphia  全ての件名で検索
一般注記	Thesis (Ph. D.)-- University of Pennsylvania, {1916}.

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