@booklet {5994,
	title = {KRIVDIK, S.G. and TKACHUK, V.I. 1990. Petrology of the alkaline rocks of the Ukrainian Shield. Naukova Dumka, Kiev. 407 pp.},
	year = {1990},
	note = {KRIVDIK, S.G. and TKACHUK, V.I. 1990. Petrology of the alkaline rocks of the Ukrainian Shield. Naukova Dumka, Kiev. 407 pp.}
}
