[China] Ke-Shing Chang, P.,History of Postal Cancellation of China, Part I-X. 1989-95, hardbound, 10 volumes, 5,780pgs, an extensive work on the subject, with companion work A Concise Catalogue of Postal Cancellation of China (1872-1949) hardbound, 743pgs; light use. Estimate; $150 - 200. US$150-200