Common minerals and rocks, their occurrence and uses,
George, Russell D., 1866-
Common minerals and rocks, their occurrence and uses, by R. D. George. - Denver, Col., The Smith-Brooks printing co., 1913. - 406 p. illus. 24 cm. - Colorado. Geological survey. Bulletin 6 .
gs 13000440
Mineralogy--Colorado.
Petrology--Colorado.
QE91 / .A4 no. 6
Common minerals and rocks, their occurrence and uses, by R. D. George. - Denver, Col., The Smith-Brooks printing co., 1913. - 406 p. illus. 24 cm. - Colorado. Geological survey. Bulletin 6 .
gs 13000440
Mineralogy--Colorado.
Petrology--Colorado.
QE91 / .A4 no. 6