1. Philatelic 72/22/1/60 Reference (shelfmark): Philatelic 72/22/1/60 Title: The People's Republic of China Postage Stamp Issue: Developing the Petroleum Industry Scope & Content: Stamps designed by Yuan Yunfu. Manufactured by the Beijing Postage Stamp Printing Works using a photogravure printing process. Collection Area: Philatelic Collections Languages: English Date Range: 31 Jan 1978 Extent: 6 Items