返回Google圖書搜尋

Report of Progress in the Fayette & Westmoreland District of the Bituminous Coal-fields of Western Pennsylvania: Eastern Allegheny County and Fayette and Westmoreland counties west from Chestnut Ridge

出版	Board of Commissioners, 1877
URL	http://books.google.com.hk/books?id=ehptFF9KL1wC&hl=&source=gbs_api