Jan Francke has authored a comprehensive chapter on the applications and instrumentation of modern ground penetrating radar technologies in the 2nd Edition of the Measurement, Instrumentation, and Sensors Handbook. The Handbook has been published by the CRC Press and is available at Amazon and other sources. http://www.amazon.ca/Measurement-Instrumentation-Sensors-Handbook-Second/dp/1439848912/ref=sr_1_1?s=books&ie=UTF8&qid=1412620734&sr=1-1&keywords=9781439848913