@book{229937,
	author = {Hangala L.S.},
	title = {The early proterozoic Zn-Pb-Cu massive sulfide deposit at Attu, SW Finland},
	publisher = {Geologian tutkimuskeskus},
	year = {1987},
	series = {Bulletin (Geologinen tutkimuslaitos (Finland)},
	address = {Espoo}
}