@book{29740,
	author = {Lovering, T. S. and Goode, H. D.},
	title = {Measuring geothermal gradients in drill holes less than 60 feet deep,},
	publisher = {U.S. Govt. Print. Off.,},
	year = {1963.},
	series = {United States. Geological Survey. Bulletin},
	address = {Washington,}
}