Introduces geophysical methods used to explore for natural resources and to survey earth structure for purposes of geological and engineering knowledge. These methods include seismic refraction and reflection surveying, gravity and magnetic field surveying, electrical resistivity and electromagnetic field surveying, and geophysical well logging. Covers modern field procedures and instruments, as well as data processing and interpretation techniques, including graphical methods. All basic surveying methods are described step-by-step, and illustrated by practical examples. Well illustrated.