Title: The District of Columbia
First published: 1950
Subjects: Building stones, Buildings, structures, Economic Geology, Formations (Geology), Geology, Geology, Economic, Historical geology, Igneous Rocks, Mineralogy, Rocks, Igneous, Rocks, Sedimentary, Sedimentary Rocks
Places: Washington (D.C.)
LC classification: QE75 .B9 no.967, QE97.C36 .B9 no.967