@book{25363,
	author = {Agg, Thomas Radford, and Nichols, Charles Sabin,},
	title = {The use of Iowa gravel for concrete,},
	publisher = {Iowa State College of Agriculture and Mechanic Arts,},
	year = {1913.},
	series = {Bulletin 34, Engineering Experiment Station. Good Roads Section},
	address = {Ames, Ia.,},
	note = {At head of title: Bulletin of Iowa State College of Agriculture and Mechanic Arts, vol. XII, Dec. 1, 1913, no. 20.}
}