@book{30307,
	author = {Zubovic, Peter, and Stadnichenko, Taisia Maximovna,},
	title = {Minor elements in American coals},
	publisher = {U.S. Govt. Print. Off.},
	year = {[1961-1967]},
	series = {United States. Geological Survey. Bulletin},
	address = {Washington,},
	note = {Part of illustrative matter folded in pocket.}
}