Second geological survey of Pennsylvania : report of progress

＜図書＞
Second geological survey of Pennsylvania : report of progress

データ種別	図書
出版情報	Harrisburg : Board of commissioners for the second geological survey
本文言語	英語


1	H7 A revision of the bituminous coal measures of Clearfield county / by H. M. chance Harrisburg : Board of commissioners for the second geological survey , 1884