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- 76608388 contributor B2992989.
- 76608388 contributor B2992990.
- 76608388 created "1977.".
- 76608388 date "1977".
- 76608388 date "1977.".
- 76608388 dateCopyrighted "1977.".
- 76608388 extent "iv, 25 p. :".
- 76608388 isPartOf "Geological Survey circular ; 747".
- 76608388 isPartOf "Geological Survey circular ; 747.".
- 76608388 issued "1977".
- 76608388 issued "1977.".
- 76608388 language "eng".
- 76608388 publisher "[Washington] : Geological Survey,".
- 76608388 spatial "Pennsylvania Allegheny Co.".
- 76608388 spatial "Pennsylvania Allegheny County.".
- 76608388 subject "557.3/08 s 551.3/5".
- 76608388 subject "Land use Pennsylvania Allegheny County.".
- 76608388 subject "Landslides Pennsylvania Allegheny Co.".
- 76608388 subject "QE75 .C5 no. 747 QE599.U5".
- 76608388 subject "Subsidences (Earth movements) Pennsylvania Allegheny Co.".
- 76608388 title "Environmental geology, Allegheny County and vicinity, Pennsylvania : description of a program and its results / by Reginald P. Briggs ; prepared in cooperation with the Appalachian Regional Commission.".
- 76608388 type "text".