@book{28459,
	author = {Trask, Parker D. and California.},
	title = {Geologic description of the managanese deposits of California,},
	year = {1950.},
	series = {California.  Dept. of Natural Resources.  Division of Mines.  Bulletin,},
	address = {San Francisco,},
	note = {Part of illustrative matter in pocket.}
}