por Ernest, John W | Dorr, Eugene L [ed.] | Contin Sanz, Agustín [tr.] | Villarreal Villarroel, Héctor [rev.].
por Logan, William B | Dorr, Eugene L [ed.] | Díaz Mata, Alfredo [tr.] | Villarreal Villarroel, Héctor [rev.].