pp. 21–29. Robson Lowe, The Encyclopædia of British Empire Postage Stamps, 1775-1950, London, Robson Lowe Ltd., 1950, pp. 380–381. (Reprinted as Volume 40 of Billig's Philatelic Handbook) Rossiter, Stuart & John Flower. The Stamp Atlas. London: Macdonald, 1986. Pipat Choovoravech, Chronicles of Thai Postage Stamps, Bangkok, Aroonkarnpim Ltd. Part., 2003. Prakaipet Indhusophon, แสตมป์ไทย และ ประวัติไปรษณีย์ สมัยรัชกาลที่ ๔ และรัชกาลที่ ๕ (The Prakaipet Indhusophon collection of Siam : a selection of Thai stamps and related materials from pre-stamp period (circa 1835) to 1910), Bangkok, 1989. David Feldman, Classic Siam 1833-1899, formed by Surajit Gongvatana FRPSL, Geneva, David Feldman SA, 2010, pp. 34–57. Communications in Thailand Philately of Thailand