International handbook of universities and other institutions of higher education / [edited by H. M. R. Keyes and D. J. Aitken].

Geophysical aspects of the energy problem : proceedings of the 2nd course held at the School of Geophysics, “Ettore Majorana”, International Centre for Scientific Culture, Erice, Italy, June 4-18, 1978 / edited by A. Rapolla, G.V. Keller, D.J. Moore