May 1918 Issue [Article] The frontier of the forbidden land Download PDF Adjust Share by Roy Chapman Andrews, This article is only available as a PDF to subscribers. Download PDF Tags 20th century Asiatic Zöological Expedition of the American Museum of Natural History China Description and travel Hunting Natural history Roy Chapman Andrews Social life and customs Yunnan Shen Yunnan Sheng Yunnan Sheng (China) Zoology Adjust Share