Measurement of slope deformation using quadrilaterals /
Baum, Rex L.
Johnson, Arvid M.
Fleming, Robert W.
Washington : U.S. G.P.O.,
1989.
A description of a new method for measuring displacement at the boundaries of a landslide and strain and tilt at the surface of a landslide.
Landslides
Slopes (Soil mechanics)
Quadrilaterals.