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CREG Journal
Contents. (This is a bit-map scan).

Cave Detection with rho, sigma, mu, epsilon Part 2
David Gibson continues with a summary of the effects of each parameter and a list of further reading.

Footnote on Optimal Cave Radio Design
A footnote to the article on modulation methods & s/n ratio.

Modulation Methods and Signal/Noise Ratio
David Gibson discusses the different modulation techniques suitable for cave radio, and explains how they affect the s/n ratio.

SSB Modulation Review
David Gibson explains the different methods of achieving single-sideband modulation.

Project Greensites
A review of the South Wales Caving Club 'Greensites' project for cave detection. Reviewed by David Gibson.

Geophysical Techniques for Cave Detection, Part 1
Geologist Phil Ingham reviews seismic and gravimetric methods.

Expedition Radio
Wookey reports on the use of portable radios on caving expeditions.

Navigational Aids for Cave Surveyors
Dick Glover suggests some ideas.

GIS, KIS and Fractals - the Xanadu Effect
Dick Glover pokes fun at geographers.

A Digital DSB/AM Modulator - Introduction
A summary of an article in the next issue.

Subsurface Interface Radar
Brief report on using radar to find buried archeological sites.