00529nam a2200133Ia 4500008004100000010001200041040001700053082002500070100002000095245010700115260003200222300001300254650012800267190327s9999||||xx |||||||||||||| ||und||  a57-7234  aNITILcNITIL  221sta371.425bH798O  aHoppock, Robert 0aOccupational informationbwhere to get it and how to use it in counseling and teachingcRobert Hoppock  aNew YorkbMcGraw-Hillc1957  ax, 534p.  aOccupations-Classification; Information science-Study and teaching; Information theory in education; Educational counseling