Cortina, R. Diez de la 1859- Cortina's Spanish in 20 lessons, [electronic resource] . — New York, N.Y., : R. D. Cortina co., inc., [1943]. — 2 p.1., 3-443 p. incl. front. 21 cm. LCCN: 43009439 Subjects--Topical Terms: Spanish language--Grammar. LC Class. No.: PC4111 / .C6 1943