— Symposium de Exploracion Geoquimica (Primer Tomo)

Mexico, D.F. xvi, 234, figs + charts (some folding). . HB. 8vo, library buckram, orig. printed wrapper retained. Padded to rear with blank leaves. Withdrawn from an institutional library with a few neat ink stamps.. XX Congresso Geologico Internacional, 1956. Includes papers in English and other languages (Russian, French, and Spanish). An early international collection of papers on the rapidly developing science of geochemical prospecting, including studies of the dispersion of trace metals in soils, superficial deposits and weathering zones, and their application to mineral exploration. Includes John S. Webb's substantial paper on geochemical exploration in tropical terrain and Robert W. Boyle's study of prospecting in the permafrost regions of the Yukon. First of three volumes published 1958-1960..