The comprehensive state plan which is reported was developed over an 18-month period by nine cooperating task forces and uses federal, state, and community resources. After an outline of 10 priority recommendations for the state, a general discussion of mental retardation is given which includes estimates of prevalence at city, state, and national levels. The plan for services assesses present and future specifics on prevention, diagnosis, and treatment at seven age levels from birth through adulthood and old age. Tables present levels of retardation, Maryland's five geographic areas, population projections in those five geographic areas, estimates of retarded persons by geographic regions, services provided in 1965, and agency responsibility for services. A directory of available services in each area of the state is also included. (DF)