@Book{BVMC:230511,
author = {Gullón, Ricardo},
title = {Francisco Ayala: "Los usurpadores." Editorial Sudamericana, Buenos Aires, 1949. 244 págs. 6 pesos},
publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2006},
year = {2006},
url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcqn6j1}
}