Radioisotope tracers in industry and geophysics. Proceedings of the symposium ... held by the International Atomic Energy Agency in Prague, 21-25 November 1966. [Illustrated]. Symposium on Radioisotope Tracers in Industry and Geophysics (1966 : Prague, Czechoslovakia) International Atomic Energy Agency. Radioisotopes Industrial applications Congresses. Radioactive tracers in geophysics Congresses. Radioactive tracers Congresses. TK9400 .S858 1966 539.752 INR "STI/PUB/142." English, French or Russian. Includes bibliographies. Vienna, International Atomic Energy Agency, 1967. 1967. 1967 Text 710 p. eng engfrerus Proceedings series Proceedings series (International Atomic Energy Agency)