TY - BOOK AU - Duncan,Delbert J. TI - Programmed learning aid for retailing: modern concepts and practices SN - 0256022453 PY - 1979/// CY - Homewood, Ill. PB - Learning systems KW - Retail trade KW - Management KW - Programmed instruction N1 - Cover title : Self review in retailing: modem concepts and practices; Includes bibliographical references and index ER -