@book{71187,
	author = {Stagg, Mark S. and Engler, Alvin J.},
	title = {Measurement of blast-induced ground vibrations and seismograph calibration},
	publisher = {U.S. Dept. of the Interior, Bureau of Mines},
	year = {1980.},
	series = {Report of investigations - Bureau of Mines},
	address = {[Washington]}
}