1. Topographic reconnaissance map of headwater regions of Copper, Nabesna, and Chisana Rivers, Alaska [cartographic material]. Yale Public content 1902. 2018-05-18T18:35:50Z. 2018-09-05T19:39:19Z. Schrader, Frank C. (Frank Charles), 1860-1944. The Survey. English. cartographic image. Public. Copper River Watershed (Alaska) and Wrangell Mountains (Alaska).