Geochemical studies of rare earth elements in the Portuguese Pyrite Belt, and geologic and geochemical controls on gold distribution /

Autor Earhart, Robert L., Carvalho, Delfim de, Oliveira, Vitor, Oliveira, Jose T., Castro, Paulo
Vydáno 1998

Mineral resources of the Scotchman Peak wilderness study area, Lincoln and Sanders Counties, Montana, and Bonner County, Idaho /

Vydáno 1981