Yiyang Xian he tu.
宜陽縣河圖. | Map of the river systems in Yiyang County
Scale ca. 1:25,000. Shows rivers in Yiyang Xian, Henan Sheng. Cover title. Manuscript on silk. Labels pasted on to show physical features. Oriented with north to the bottom. Relief shown pictorially. Pictorial map. Hummel purchase 1934, no. 22. Available also through the Library of Congress Web site as a raster image. Includes text. Previous call number: G7823.Y55C3 1767 .Y5 Vault Shelf AACR2