1. Dix, C. H., Seismic prospecting for oil, Harper’s Geoscience Series, New York, NY, USA, 1952.
2. GUYOD, H. and SHANE, L. E., Geophysical well logging, Vol. 1, Hubert Guyod, Houston, Tex, USA, 1969.
3. GRANT, F. S. and WEST, G. F., Interpretation theory in applied geophysics, McGraw-Hill, New York, NY, USA, 1965.
4. GAL’PERIN, E. I., Vertical seismic profiling, SEG special publication No. 12 (ed. J. E. White), Box 3098, Tulsa, Okla, USA, 1974.
5. KENNETT, P. and IRESON, R. L., Recent development in well velocity surveys and the use of calibrated acoustic logs, Geophys. Prospecting, 19, No. 3, p. 395,1971.