1. Map showing the distribution and abundance of strontium and lanthanum in bedrock samples, western Chichagof-Yakobi Islands Wilderness study area, southeastern Alaska [cartographic material] Yale Public content 1981. 2002-06-01T04:00:00Z. 2023-01-07T04:01:24Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. Alaska.