Seller: Antiquariat Bernard Richter, Baden-Baden, Germany
AND: A new contribution to subsurface studies by means of electrical measurements in drill holes)(= Technical Publications N. 462 and 503; Class G, Petroleum Division, No. 38 and 40; Class L, Geophysical Prospecting, No. 32 and 39). 38 p, 22 figs.; 18 pp, 9 figs. Printed wrappers. New York, The American Institute of Mining and Metallurgucal Engineers s.d. (1932-1933).