TY - GEN A2 - Steven, Thomas A. (Thomas August), 1917-2013 A2 - Hon, Ken A2 - Lanphere, Marvin A., 1933- AU - Geological Survey (U.S.) CN - I 19.91:I-2504 CY - Reston, VA CY - Denver, CO LA - English PB - [The Survey, For sale by Map Distribution] PP - Reston, VA PP - Denver, CO PY - 1995 TI - Neogene geomorphic evolution of the central San Juan Mountains near Creede, Colorado ER -