371.425
B141O
           Baer, Max F
               Occupational information its nature and use \ Max F Baer - Chicago : Science Research Associates, 1951.
               xi, 603p. - Professional guidance series/ed by Clifford P Froechlich .
20523
                Subjects: Occupaitons-Classification; Occupation-Sociological aspects; Information science-Study and teaching; Information theory in education.