371.425
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           Shartle, Carroll L
               Occupational information its development and apllication \ Carroll L Shartle - 2nd - Englewood Cliffs : Prentice-Hall, 1952.
               xiii, 425p. - Prentice-Hall industrial relations and personnal series/ed by Dale Yoder .
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                Subjects: Occupational-Classification; Professional education; Informatoin services.