"මුද්දර නාමාවලි" හි සංශෝධන අතර වෙනස්කම්
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50 පේළිය:
== මූලාශ්ර ==
* Phillips, Stanley. Stamp Collecting: A guide to modern philately, revised edition, Stanley Gibbons, London, 1983, p.243. ISBN 0-85259-047-4.
* John Edward Gray, A hand catalogue of postage stamps for the use of collectors, London, Robert Hardwicke, 1862
* "Early Postage Stamp Catalogs" by George B. Sloane in Stamps, 13 July 1946.
* Herbert A. Trenchard and George T. Turner, "John William Kline America's First Philatelic Author", in Philatelic Literature Review, Vol. 42, No. 1, pp. 24-41, 1993
* Phila India 2011-12 Guide Book,PHILATELIA,KOLKATA,INDIA
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