Da Silva, Zenia Sacks, A concept approach to Spanish /Zenia Sacks Da Silva [and] Gabriel H. Lovett. - second edition. - New York : Harper and Row, (c)1965. - xvi, 389 pages ; 25 cm. LCCN: 65011707 Subjects--Topical Terms: Spanish language--Grammar. LC Class. No.: PC4111 / .C663 1965 PC4111