TY - BOOK AU - Brook,Robert H.(Robert Henry) AU - Williams,Kathleen N. AU - Davies,Allyson Ross ED - Research and Development Corporation, TI - Quality assurance in the 20th century : will it lead to improved health in the 21st? T2 - The Rand paper series PY - 1975/// CY - Santa Monica, California PB - Rand Corporation KW - Medical care KW - United States. N1 - Includes bibliographical references (page 43) ER -