Snead, R.E. (1980). World Atlas of Geomorphic Features, Krieger, New York, 301 pp.
Stauffer, B., and W. Berner (1978). CO2 in natural ice, Journal of Glaciology 21(85), 291-299 (with discussion, p. 300).
Sugden, D.E. (1977). Reconstruction of the morphology, dynamics and thermal characteristics of the Laurentide Ice Sheet at its maximum, Arctic and Alpine Research 9, 21-47.
Sugden, D.E. (1978). Glacial erosion by the Laurentide ice sheet, Journal of Glaciology 20(83), 367-391.
Sugden, D.E., and B.S. John (1976). Glaciers and Landscape: A Geomorphological Approach, John Wiley & Sons, New York, 376 pp.
UNESCO (1978). World Water Balances and Water Resources of the Earth, UNESCO Press, Paris.
Volk, T. (1987). Feedbacks between weathering and atmospheric CO2 over the last 100 million years, American Journal of Science 287, 763-779.
Walker, J.C.G., P.B. Hays, and J.F. Kasting (1981). A negative feedback mechanism for the long-term stabilization of Earth's surface temperature, Journal of Geophysical Research 86, 9776-9782.
Webb, T., III, P.J. Bartlein, and J.E. Kutzbach (1987). Climatic change in eastern North America during the past 18,000 years: Comparisons of pollen data with model results, in North America and Adjacent Oceans During the Last Deglaciation, W.F. Ruddiman and H.E. Wright, Jr. , eds., Vol. K-3, The Geology of North America, The Geological Society of America, Boulder, Colorado, pp. 447-462.
White, W.A. (1972). Deep erosion by continental ice sheets, Geological Society of America Bulletin 83, 1037-1056.