//-->
Steel and steel making raw materials : prospects for iron ore, steel, metallurgical coal and nickel
Richmond, Simon, (2006)
Minerals in the Australian economy : iron ore, bauxite, alumina and aluminium, coking coal
Freeman, R. D., (1971)
Iron-nickel-cobalt resources of Nonoc, Awasan, and Southern Dinagat Islands in parcel-2 of the Surigao mineral reservation, Surigao/Mindanao
Wright, Wilford S., (1958)