@book{24299,
	author = {Eckel, Edwin C.},
	title = {Cement materials and industry of the United States /},
	publisher = {Govt. Print. Off.,},
	year = {1905.},
	series = {U.S. Geological survey. Bulletin},
	address = {Washington,},
	note = {Subject series: A, Economic geology, 39; B, Descriptive geology, 50.}
}