1965-1972. Two hardcover volumes in very good condition plus 1972 paperback supplement. Volume I - 1965, 398 pp. Volume II- 1967, 447 pp. English translation based upon Las Aves de Chile by the present author, with the collaboration of J.D. GOODALL and R.A. PHILIPPI B. Over 200 color plates by J.D. Goodall, a number of B&W photographs. A very good set with very minor shelf wear. Previous owners info inside front cover and on ffep of both volumes. Lacking dust jackets.