Bleeker, Tom. Japanese Occupation Issues of the Dutch East Indies, Cockrill Booklet 27, 1982.
Cockrill and Haalebos. K.P.M. Koninklijke Paketvaart Maatschappij 1891-1941 with the Java - China - Japan - Line to 1970, Cockrill Booklet 38, 1982.
Jersey, Stanley. C. Japanese Military Forces in the Solomon Islands, 1984.
Kearney, Patrick N. Japanese Occupation Postmarks of Malaya, 1990.
Mosher, John. Japanese Post Offices in China and Manchuria, 1978.
Tatsuji, Nishioka. 65 Years in Stamps, A philatelic history of the Showa Period, 1994, (English Edition).
Webb, Francis W. The Philatelic and Postal History of Hong Kong and the Treaty Ports of China and Japan, 1994 (reprint).