Prepared under the supervision of William Bullock Clark, geologist in charge, by George Burbank Shattuck, Benjamin LeRoy Miller, and Arthur Bibbins]U.S. Geological Survey1907
全国の図書館
- 件名Geology -- Maryland Maps Geology -- Washington (D.C.) Maps
- 件名（識別子）Geology -- Maryland Maps Geology -- Washington (D.C.) Maps