United States, Office of Strategic Services., Research and Analysis Branch. No. A 3488--R & A, OSS; 15 February 1945. "Base from: "Census of the Philippines, 1939," Volume 1, Manila, 1940.". G.P.O.
United States, Office of Strategic Services., Research and Analysis Branch. No. A 3491--R & A, OSS; 2 February 1945. "Base from: "Census of the Philippines, 1939," Volume 1, Manila, 1940.". G.P.O.
United States, Office of Strategic Services., Research and Analysis Branch. No. A 3494--R & A, OSS; 15 February 1945. "Base from: "Census of the Philippines, 1939," Volume 1, Manila, 1940.". G.P.O.