1. Colorado : Gunnison : 1:100,000-scale topographic map : 30 x 60 minute series (topographic) Yale Public content 2002. 2003-08-15T15:18:02Z. 2011-03-25T23:09:10Z. United States. Bureau of Land Management. The Bureau ; For sale by BLM Colorado State Office ; U.S. Geological Survey. English. Public. Colorado.