National Institute of Mental Health, National Institutes of Health, Public Health Service, U.S. Dept. of Health, Education, and Welfare[1964]<016.131-Un27b>
Published for the President's Panel on Mental Retardation by the U.S. Dept. of Health, Education, and Welfare, Public Health Service; for sale by the Superintendent of Documents, U.S. Govt. Print Off.1963]<016.131-Up93b>