Preliminary geologic map, District of Columbia
A.J. Froelich
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John Tilton Hack
C. Scott Southworth
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David K. Brezinski
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Randall C. Orndorff
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Peter G. Chirico
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Kerry M. Lagueux
C. Scott Southworth
◽
David K. Brezinski
◽
Randall C. Orndorff
◽
Peter G. Chirico
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Kerry M. Lagueux
John E. Moore
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Leonard A. Wood