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by Guevara, Ernesto Che; Salles, Walter; Vitier, Cintio; et al.
by Cisneros, Ernesto
by Gliessman, Stephen R.; Ernesto Méndez, V.; Izzo, Victor M.; et al.
by Kruger, Jessica; Moralez, Ernesto A.; Siqueira, C. Eduardo
by Guevara, Ernesto Che
by Guevara, Ernesto Che; Villegas, Harry Pombo
by Guevara, Ernesto Che; García, María del Carmen Ari