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Philadelphia: G. T. Bisel Co, 1924 ; Farmington Hills, Mich: Thomson Gale
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Philadelphia, Pa: Geo. T. Bisel Co, 1916 ; Farmington Hills, Mich: Thomson Gale
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Santa Monica, CA: RAND Corp./Center for haealth and safety in the workplace, 2008 ; [S.l.]: HathiTrust Digital Library, 2010
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S.l.: W. Stanley Ray, State Printer, 1901 ; Farmington Hills, Mich: Thomson Gale
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Harrisburg, Pa: Issued by the Workmen's Compensation Bureau of the Department of Labor and Industry of Pennsylvania, 1918 ; Farmington Hills, Mich: Thomson Gale
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[Erscheinungsort nicht ermittelbar]: RAND Corporation, 2008
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JSTOR, 1980