Skinner, B. F. (Burrhus Frederic) 1904- creator Vaughan, M. E. (Margaret E.) sp Barcelona Martinez Roca c1986 1986 spa 181 p. 20 cm. B.F. Skinner & M.E. Vaughan. Translation of: Enjoy old age. Includes bibliographical references. Aged Life skills guides Aged Psychology Old age Philosophy Vejez. HQ1061 .S526 1986 8427010435 JCP 870820 20220428184843.0 20