Measurement of slope deformation using quadrilaterals : 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 / by Rex L. Baum, Arvid M. Johnson, and Robert W. Fleming (Landslide processes in Utah--observation and theory ; ch. B) (U.S. Geological Survey bulletin ; 1842)
Measurement of slope deformation using quadrilaterals : 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 / by Rex L. Baum, Arvid M. Johnson, and Robert W. Fleming
(Landslide processes in Utah--observation and theory ; ch. B) (U.S. Geological Survey bulletin ; 1842)