@article {68536,
	title = {Chert-Hosted Manganese Deposits in Sedimentary Sequences of the Franciscan Complex, Diablo Range, California},
	year = {1987},
	pages = {1-31},
	keywords = {California, carbon, Sedimentary sequences, sediments},
	author = {Hein, James R. and Koski, Randolph A.}
}
