Dictionary of occupational titles /
U.S. Department of Labor, Employment and Training Administration, U.S. Employment Service.

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Item Link Original Source
Full view   v.1 Purdue University
Full view   v.1 University of Illinois at Urbana-Champaign
Full view   v.1 University of Illinois at Urbana-Champaign
Full view   v.1 (1991) University of Minnesota
Full view   v.2 Purdue University
Full view   v.2 (1991) University of Minnesota