The use of geophysical surveying methods in the detection of natural cavities and mineshafts
McCann, D.
The use of geophysical surveying methods in the detection of natural cavities and mineshafts - 1987 - Quarterly Journal of Engineering Geology 20 1987, 59-73(15) .
Citation from CSM article `Detecting mineshafts using geophysical techniques` CSM:M 3(1) September 1993, 4-6. Stored on gallery.
The use of geophysical surveying methods in the detection of natural cavities and mineshafts - 1987 - Quarterly Journal of Engineering Geology 20 1987, 59-73(15) .
Citation from CSM article `Detecting mineshafts using geophysical techniques` CSM:M 3(1) September 1993, 4-6. Stored on gallery.