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- 68065238 contributor B1875112.
- 68065238 created "1967.".
- 68065238 date "1967".
- 68065238 date "1967.".
- 68065238 dateCopyrighted "1967.".
- 68065238 description "Bibliography: p. 43.".
- 68065238 extent "vi, 73 p.".
- 68065238 isPartOf "Pennsylvania. Topographic and Geologic Survey. Bulletin M55".
- 68065238 isPartOf "Pennsylvania. Topographic and Geologic Survey. Mineral resources report M55".
- 68065238 issued "1967".
- 68065238 issued "1967.".
- 68065238 language "eng".
- 68065238 publisher "Harrisburg,".
- 68065238 spatial "Pennsylvania Houtzdale region.".
- 68065238 subject "553/.2/0974861".
- 68065238 subject "Coal Geology Pennsylvania Houtzdale region.".
- 68065238 subject "TN805.P4 K617".
- 68065238 title "Petrography of coal in the Houtzdale quadrangle, Clearfield County, Pennsylvania, by Edwin F. Koppe.".
- 68065238 type "text".