Late-Quaternary Environments of the United States, Volume 1, The Late Pleistocene. Stephen C. Porter, editor. University of Minnesota Press, Minneapolis, 1983. xiv + 407 pp., figures, tables, references. $45.00 (cloth). - Late-Quaternary Environments of the United States, Volume 2, The Holocene. H.E. Wright, Jr. editor. University of Minnesota Press, Minneapolis, 1983. xvii + 277 pp., figures, tables, references. $45.00 (cloth).