Ameliano Rios, Oscar. 22 years old; Single; Construction worker; YCL 1936, Hod Carriers and Laborers Union AFL; Received Passport# 31167, San Francisco series, on August 20, 1937 which listed his address as 276 South Delacy Street, Pasadena, California; Sailed September 1, 1937 aboard the Aquitania; Arrived in Spain via Setcases on September 13, 1937; Served with the XV BDE, Lincoln-Washington BN, Co. 1; Artillery, 11th Regt., 2nd Group, 14th Battery (John Brown Battery), 155mm Guns; Returned to the US on February 4, 1938 aboard the President Harding; WWII Armed forces.

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Sources: Sail; Scope of Soviet Activity; Cadre (under Rios, O. A.); Figueres List; RGASPI (under Rios, Oscar Ameliano) RGASPI Fond 545, Opis 6, Delo 972, ll. 11-15.