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Edition Notes
Caption title.
At head of title: U.S. Department of Labor, Children's Bureau, Washington.
"Revised reprint from September, 1922, issue of the American journal of public health. 37466°--23"--Footnote, bottom of unnumbered first page.
No restrictions on access copy. Unrestricted online access
Digital master created according to Benchmark for Faithful Digital Reproductions of Monographs and Serials, Version 1. Digital Library Federation, December 2002. http://purl.oclc.org/DLF/benchrepro0212