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Google圖書搜尋
Geologic Map of the Loudoun County Portion of the Middleburg Quadrangle, Virginia
Stephen W. Kline
Peter T. Lyttle
Albert Joseph Froelich
出版
U.S. Geological Survey
, 1991
URL
http://books.google.com.hk/books?id=EDRUzgEACAAJ&hl=&source=gbs_api