TY - RPRT TI - A digital photogrammetric method for measuring horizontal surficial movements on the slumgullion earthflow, Hinsdale county, Colorado AU - P. S. Powers AU - M. Chiarle AU - W. Z. Savage PY - 1996 DO - 10.1016/0098-3004(96)00008-8 UR - https://pubs.usgs.gov/publication/70018480 ID - 70018480 ER -