1. ANON. (1950). Interpretation Handbook for Resistivity Logs, Document No. 4, Schlumberger Well Surveying Corporation, USA.
2. ANON. (1955). Resistivity Departure Curves (Beds of Infinite Thickness), Document No. 7, Schlumberger Well Surveying Corporation, USA.
3. ANON. (1958). Introduction to Schlumberger Well Logging, Document No. 8, Schlumberger Well Surveying Corporation, USA.
4. ANON. (1969) (i) Log Interpretation Principles, Schlumberger Limited, USA.
5. ANON. (1972) (ii) Log Interpretation Charts, Schlumberger Limited, USA.