1. Applied Geophysics for Geologists and Engineers;Griffiths,1981
2. The reciprocal method of routine shallow seismic refraction investigations;Hawkins;Geophysics,1961
3. The plus-minus method of interpreting seismic refraction sections;Hagedoorn;Geophys. Prospect.,1959
4. Geological and geophysical methods in the location and design of services;Prentice;Underground Services,1976
5. The hidden layer problem;Green;Geophys. Prospect.,1962