Published also as Bulletin of the U.S. Bureau of Labor Statistics, whole no. 146, 1914.
Thesis
Thesis (Ph.D.)--Columbia University, 1915.
Reproduction
Electronic text and image data. Ann Arbor, Mich. : University of Michigan University Library, 2003. Includes both TIFF files and keyword searchable text. (Making of America) Mode of access: Internet. The conversion of this volume made possible by U-M alumnus Lawrence Portnoy, BA 1985.