Schumann, H.H., 1995, Land subsidence and earth-fissure hazards near Luke Air Force Base, Arizona [abs.], in Prince, K.R., Galloway, D.L., and Leake, S.A., eds., U.S. Geological Survey Subsidence Interest Group Conference, Edwards Air Force Base, Antelope Valley, California, November 18-19, 1992: Abstracts and Summary: U.S. Geological Survey Open-File Report 94-0532, p. 18-21.
