Harder, E. C., & Johnston, A. W. (1918). Preliminary report on the geology of east central Minnesota including the Cuyuna iron-ore district. University.
Chicago-Zitierstil (17. Ausg.)Harder, Edmund C., und A. W. Johnston. Preliminary Report on the Geology of East Central Minnesota Including the Cuyuna Iron-ore District. Minneapolis: University, 1918.
MLA-Zitierstil (9. Ausg.)Harder, Edmund C., und A. W. Johnston. Preliminary Report on the Geology of East Central Minnesota Including the Cuyuna Iron-ore District. University, 1918.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.