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Geological exploration of the southern Rock Creek Valley in DC : Washington, D.C., July 13, 1989 : field trip guidebook T208 /
Washington, D.C. : American Geophysical Union, 1989

Conference Proceeding Book
3
Engineering geology of Washington, D.C. : Washington, D.C. to Greenbelt, Maryland, July 14, 1989 : field trip guidebook T234 /
Washington, D.C. : American Geophysical Union, 1989

Conference Proceeding Book
4
A Different view of stone monuments, memorials and buildings of Washington, D.C. : Washington, D.C., July 13, 1989 : field trip guidebook T235 /
Washington, D.C. : American Geophysical Union, 1989

Conference Proceeding Book
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