Lepp, H. (1966). Chemical composition of the biwabik iron formation, Minnesota.
Cita Chicago Style (17a ed.)Lepp, Henry. Chemical Composition of the Biwabik Iron Formation, Minnesota. 1966.
Cita MLA (8a ed.)Lepp, Henry. Chemical Composition of the Biwabik Iron Formation, Minnesota. 1966.
Precaución: Estas citas no son 100% exactas.