TY - BOOK AU - Berry,Sandra H. ED - Research and Development Corporation, ED - United States. TI - Sample selection for the prescription drug information study T2 - A Rand Note PY - 1981/// CY - California PB - Rand Corporation KW - Drugs KW - Labeling KW - Pharmacy KW - Information services KW - Evaluation KW - Sampling (Statistics) N1 - Includes bibliographical references (p.71-72) ER -