00710cam a22002411 4500 gs 64000284 DLC 20260227111414.0 821014s1964 dcua b f000 0 eng c gs 64000284 (OCoLC)8859550 U.S. Geol. Survey Libr. MsSM DLC premarc QE75 .C5 no. 485 Scheidegger, Adrian E., 1925- Lithologic variations in slope development theory. Washington, 1964. iii, 8 p. diagrs., tables. 26cm. Geological Survey (U.S.). Circular, 485 Bibliography: p. 8. Slopes (Physical geography) Erosion. 29873 29873