Lightfoot, Peter C. Chemical evolution and origin of nickel sulfide mineralization in the Sudbury igneous complex, Ontario, Canada - Lancaster, PA Economic Geology Publishing Company December 2001 - pp. 1855-1875 ilus., tbls. Subjects--Topical Terms: COBREGENESIS-YACIMIENTOGEOLOGIA ECONOMICAMINERALIZACIONNIQUELQUIMIOESTRATIGRAFIA Subjects--Geographic Terms: CANADASUDBURY