Book reviews : Yochelson,E.L. editor,1980: The scientific ideas of G.K. Gilbert: an assessment on the occasion of the centennial of the United States Geological Survey (1879- 1979). Geological Society of America Special Paper 183. Boulder,Colorado: GSA. viii + 148 pp. US S17.00

Andrews, E.D. 1979: Scour and fill in a stream channel, East Fork River, Western Wyoming. US Geological Survey, Professional Paper 1117. (49 pp.)

Chorley, R.J. , Beckinsale, R.P. and Dunn, A.J. 1973: The history of the study of landforms. Volume 2 The life and work of William Morris Davis. London: Methuen. (874 pp.)

Davis, W.M. 1927: Biographical memoir of Grove Karl Gilbert, 1843-1918. National Academy of Sciences 21 (5th Memoir). (303 pp.)

Fairholme, G. 1834: On the Falls of Niagara. Philosophical Magazine 5, 11-25.

Gilbert, G.K. 1877: Report on the geology of the Henry Mountains. US Geographical and Geological Survey of the Rocky Mountain Region, Washington, DC. (160 pp.)

1886: The inculcation of scientific method by example. American Journal of Science 31, 284-99.

1898 : Recent earth movements in the Great Lakes Region. US Geological Survey, 18th Annual Report, part II, 595-647.

1914a: The transportation of debris by running water. US Geological Survey, Professional Paper 86. (263 pp.)

1914b: Interpretation of anomalies of gravity. US Geological Survey, Professional Paper 85-C, 29-37.

1917 : Hydraulic-mining debris in the Sierra Nevada. US Geological Survey, Professional Paper 105. (154 pp.)

Hunt, C.B. , Averitt, P. and Miller, R.L. 1953: Geology and geography of the Henry Mountains regions, Utah. US Geological Survey, Professional Paper 228. (234. pp.)

Keller, E.A. 1971: Areal sorting of bed-load material: the hypothesis of velocity reversal. Geological Society of America Bulletin 82, 753-56.

Langbein, W.B. and Schumm, S.A. 1958: Yield of sediment in relation to mean annual precipitation . Transactions of the American Geophysical Union 39, 1076-84.

Lisle, T. , 1979: A sorting mechanism for a riffle-pool sequence. Geological Society of America Bulletin, part II 90, 1142-57.

Melhorn, W.N. and Flemal, R.C., editors, 1975: Theories of landform development . Binghamton, State University of New York, Publications in Geomorphology. (306 pp.)

Powell, J.W. 1875: Exploration of the Colorado River of the West. Washington, DC: US Government Printing Office. (291 pp.)

Pyne, S.J. 1975: The mind of Grove Karl Gilbert. In Melhom, W.N. and Flemal, R.C. , 1975, 277-98.

Stoddart, D.R. 1966: Darwin's impact on geography. Annals of the Association of American Geographers 56, 683-98.