1. Philatelic 72/22/1/33 Reference (shelfmark): Philatelic 72/22/1/33 Title: The People's Republic of China Postage Stamp Issue: National Conference on Learning from Dazhai in Agriculture Scope & Content: Stamps designed by Li Yinqing. Manufactured by the Beijing Postage Stamp Printing Works using a photogravure printing process. Collection Area: Philatelic Collections Languages: English Date Range: 13 Oct 1975 Extent: 3 Items