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Yang's catalogue is one of the three stamp catalogues published by Yang's Stamp Service of Hong Kong: :''Yang's Postage Stamps and Postal History Catalogue of Hong Kong'' N.C. Yang. (21st ed 2009) :''Yang's Postage Stamp Catalogue of The People's Republic of China (Liberated Area)'' Nai-Chiang Yang, 1998, 7th edition :''Yang's Postage Stamp Catalogue of the People's Republic of China Part II'' 2009 To correlate Wang catalog numbers and Scott catalogue numbers for Hong Kong consult ''Hong Kong Scott-Yang Catalog Correlation'' by Ralph Weil with Michael Rogers. 2006, second edition. To correlate Wang catalog numbers and Scott catalog numbers for the People's Republic of China consult ''Scott-Yang/Yang-Scott Catalog Correlation of the Peoples Republic of China (Liberated and Unified Areas)'' edited by Ralph Weil with Michael Rogers. 2006, Softbound, second edition. To correlate Wang catalog numbers and Scott catalog numbers for the Macau consult ''Macau Scott-Yang/Yang-Scott Catalog Correlation'' by Ralph Weil with Michael Rogers. 2006, second edition. Although the Liberated Area (Communist local issues from 1930-1950) catalogue is now quite old, it is still considered the best existing catalogue of this specialised area. ==Sources== *(China and Asia Literature Michael Rogers Inc ) *(Amazon review of the Liberated Area Catalogue ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Yang Stamp Catalogue」の詳細全文を読む スポンサード リンク
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