TY - RPRT TI - Longevity of treethrow microtopography: Implications for mass wasting AU - R.J. Schaetzl AU - L.R. Follmer PY - 1990 DO - 10.1016/0169-555x(90)90040-w UR - https://pubs.usgs.gov/publication/70016198 ID - 70016198 ER -