The earth, past & presentde Richard W. OjakangasMateriasEarthGeologyEdiciones (2)The earth, past& present (1976)McGraw-Hill · inglésThe earth, past & present (1976)McGraw-Hill · inglésMás obras de Richard W. OjakangasRoadside geology of MinnesotaMinnesota's geology, by Richard W. Ojakangas and Charles L. MatschBasement Tectonics 10
