Tough, Allen M. The adult's learning projects : a fresh approach to theory and practice in adult learning / Allen Tough. - 2nd ed. - Austin, Tex. : Learning Concepts, c1979. - xii, 203 p. ; 20 x 21 cm. - Research in education series ; no. 1 . Bibliography: p. 199-205. ISBN: 0774401796 LCCN: 80469937 //r85 Nat. Bib. No.: C79-94462-6 Subjects--Topical Terms: Adult education. LC Class. No.: LC5219 LC5219 / .T58 1979 / .T58 Dewey Class. No.: 374/.1