TY - RPRT TI - Control and deformation surveys at the Slumgullion Slide, Hinsdale County, Colorado– A progress report AU - D. J. Varnes AU - W. K. Smith AU - W. Z. Savage AU - K. L. Varnes PY - 1993 DO - 10.3133/ofr93577 UR - https://pubs.usgs.gov/publication/ofr93577 ID - ofr93577 ER -