Infant mortality in Pittsburgh : an analysis of records for 1920 with six charts . aphy, 1912, vol. 3,p. 141. o BOSTON PUBLIC I IRRadv 3 iiiiiiilL, 3 9999 05708 4293 HV%!~iiJ iliiVv^^.-, !M^ffi-sl; i. WASHINGTON GOVERNMENT PRINTING OFHCE 1921

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectinfants, bookyear1921