ISBN number search > Hong Kong > Yang's Stamp Service
| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2004 | 978-962-85744-3-8 | Nai-Chiang Yang | Yang's Postage Stamp and Postal History Catalogue of Hong Kong |
| 978-962-85744-4-5 | Yang's Postage stamp catalogue of The People's Republic of China 1949-2006 | ||
| 2009 | 978-962-85744-6-9 | Nai-Chiang Yang | Yang's Postage Stamp & Postal History Catalogue of Hong Kong |