GRAPHS ARE USED IN THIS CHART BOOK TO SHOW PROGRESS AND INDICATE NEEDS. SUGGESTED PRIORITY AREAS FOR ACTION ARE--RESEARCH, PREVENTIVE HEALTH MEASURES, CLINICAL AND SOCIAL SERVICES, IMPROVED CARE, A NEW LEGAL AND SOCIAL CONCEPT OF THE RETARDED, SPECIAL EDUCATION, PERSONNEL RECRUITMENT, AND PUBLIC INFORMATION PROGRAMS. THE PREVALENCE OF MENTALLY RETARDED PERSONS, THE SCOPE OF THE PROBLEM, THE TYPES AND CAUSES OF RETARDATION, PERCENTAGE OF MULTIPLY HANDICAPPED PERSONS, AND MEDICAL PROGRESS ARE DISCUSSED. STATISTICS ON INSTITUTIONALIZATION, SPECIAL EDUCATION NEEDS, AND PARENTAL CARE ARE PRESENTED. TEACHER RECRUITMENT NEEDS, REHABILITATION PROGRAMS, AND GROWING PUBLIC AWARENESS ARE DESCRIBED. THIS DOCUMENT WAS PUBLISHED BY SUPERINTENDENT OF DOCUMENTS, U. S. GOVERNMENT PRINTING OFFICE, WASHINGTON, D.C. 20402. $0.45. (JA)