"roberts, willard l. "
encyclopaedia of minerals: / willard.l. roberts - ed. - new york : van nostrand reinhold 1974. - "xxv, 693p.; 28 cm."
0-442 26820 -3
mineralogy-dictionaries--
549. 03 rob
encyclopaedia of minerals: / willard.l. roberts - ed. - new york : van nostrand reinhold 1974. - "xxv, 693p.; 28 cm."
0-442 26820 -3
mineralogy-dictionaries--
549. 03 rob