@booklet {5998,
	title = {VINOGRADOV, A.P., TUGARINOV, A.I., FEDOROVA, V.A. and ZYKOV, S.I. 1957. Age of the Precambrian rocks of the Ukraine. Geokhimiya, Communication 3, 7: 559-66.},
	year = {1957},
	note = {VINOGRADOV, A.P., TUGARINOV, A.I., FEDOROVA, V.A. and ZYKOV, S.I. 1957. Age of the Precambrian rocks of the Ukraine. Geokhimiya, Communication 3, 7: 559-66.}
}
