@book{37650,
	author = {Rosenholtz, Joseph L. and Smith, Dudley T.},
	title = {Tables and charts of specific gravity and hardness for use in the determination of minerals.},
	publisher = {Rensselaer Polytechnic Institute,},
	year = {1931.},
	series = {Engineering and Science Series},
	address = {New York :}
}