TY - RPRT TI - Distribution and quality of potential sources of aggregate infrastructure resources project area, Colorado-Wyoming AU - William H. Langer AU - Gregory N. Green AU - Daniel H. Knepper AU - David A. Lindsey AU - David W. Moore AU - L. David Nealey AU - John C. Reed PY - 1997 DO - 10.3133/ofr97477 UR - https://pubs.usgs.gov/publication/ofr97477 ID - ofr97477 ER -