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Child labor legislation in New York : the historical development and the administrative practices of child labor laws in the State of New York, 1905-1930 / by Mary Stevenson Callcott. -- New York : Macmillan , 1931. -- xv, 267 p. ; 20 cm. -- (American social progress series). -- Thesis (Ph. D.)--Columbia university, 1931 ; Bibliography: p. 265-267 ; Includes index. -- (BA4791113X) ; https://ci.nii.ac.jp/ncid/BA4791113X
Author Heading(s): Callcott, Mary Stevenson
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