The emotionally disturbed, mentally retarded: a historical and contemporary perspective [by] Earl E. Balthazar [and] Harvey A. Stevens. Balthazar, Earl Edward, 1918- Stevens, Harvey A, joint author. People with mental disabilities Mental health. Affective disorders. Affective disorders History. Mental retardation. Mental retardation History. RC570 .B23 616.8/588 616.8588 BAE Bibliography: p. 275-327. Englewood Cliffs, N.J., Prentice-Hall [1974, c1975] [1974, c1975] 1974 Text xiv, 333 p. eng Prentice-Hall series in special education