Accountability : Leon Lessinger & associates. Creta D. Sabine, editor. Contributors: Elizabeth Cunningham and others systems planning in education / Lessinger, Leon M. Sabine, Creta D. 1918- ed. Educational accountability. System analysis. 379.15 SAA Includes bibliographical references and index. Homewood, Ill. : ETC Publications, 1973. 1973. 1973 Text xiii, 242 p. : eng