1. ASCE, Geophysical Exploration for Engineering and Environmental Investigations, Technical Engineering and Design Guides as adapted from the US Army Corps of Engineers, No. 23, 1998.
2. ASTM, Symposium on Surface and Subsurface Reconnaissance, Spec. Pub. No. 122, American Society for Testing and Materials, Philadelphia, June 1951.
3. Cross-Hole and Down-Hole
V
s
by Mechanical Impulse