A worldwide reference to companies along with key personnel, that provide geophysical equipment, supplies, and services. Also listed are petroleum and mining companies and government agencies utilizing geophysical techniques. Known and recognized worldwide as the leading source of information for the geophysical industry. Published annually in March.

A comprehensive listing of companies and individuals directly connected with, or engaged in, petroleum exploration, drilling and production. Regional and worldwide coverage are provided in a single volume. Published annually in October.