1. Lower Tertiary coal bed distribution and coal resources of the Reno Junction-Antelope Creek area, Campbell, Converse, Niobrara, and Weston Counties, Wyoming [cartographic material] Yale Public content 1980. 2015-02-25T16:38:01Z. 2015-03-10T22:10:01Z. Denson, N. M. (Norman MacLaren), 1914-. The Survey. English. Public. Wyoming, Campbell County, Converse County, Niobrara County, Weston County, and U.S.