WorldCat Identities

Harper, John A.

Overview
Works: 31 works in 47 publications in 1 language and 709 library holdings
Genres: Maps  Geological maps  Guidebooks 
Roles: Author
Classifications: QE157, 557.48
Publication Timeline
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Most widely held works by John A Harper
Fossil collecting in Pennsylvania by Donald M Hoskins( Book )

2 editions published in 1983 in English and held by 119 WorldCat member libraries worldwide

Geology of the oil and gas fields of southwestern Pennsylvania by John A Harper( Book )

2 editions published in 1987 in English and held by 67 WorldCat member libraries worldwide

Oil and gas fields of Pennsylvania : 1982 by John A Harper( )

2 editions published in 1982 in English and held by 56 WorldCat member libraries worldwide

Greater Pittsburgh region: Structure contour map : of Allegheny, Armstrong, Beaver, Butler, Washington, and Westmoreland Counties by Pennsylvania( )

1 edition published in 1975 in English and held by 53 WorldCat member libraries worldwide

Oil Creek State Park, Venango County : ice and oil shape the land by John A Harper( Book )

1 edition published in 1998 in English and held by 31 WorldCat member libraries worldwide

Oil and gas developments in Pennsylvania in 1980 with ten year review and forecast by John A Harper( Book )

2 editions published in 1981 in English and held by 28 WorldCat member libraries worldwide

Oil and gas developments in Pennsylvania in 1991 by Cheryl L Cozart( Book )

2 editions published in 1993 in English and held by 28 WorldCat member libraries worldwide

Oil and gas developments in Pennsylvania in 1990 : with ten-year review and forecast by John A Harper( Book )

1 edition published in 1992 in English and held by 28 WorldCat member libraries worldwide

Oil and gas developments in Pennsylvania in 1988 by John A Harper( Book )

1 edition published in 1989 in English and held by 26 WorldCat member libraries worldwide

Oil and gas developments in Pennsylvania in 1987 by John A Harper( Book )

1 edition published in 1988 in English and held by 24 WorldCat member libraries worldwide

Oil and gas developments in Pennsylvania in 1981 by John A Harper( Book )

3 editions published in 1982 in English and held by 23 WorldCat member libraries worldwide

Oil and gas developments in Pennsylvania in 1989 by John A Harper( Book )

1 edition published in 1990 in English and held by 23 WorldCat member libraries worldwide

Oil and gas developments in Pennsylvania in 1978 by Robert G Piotrowski( Book )

1 edition published in 1979 in English and held by 23 WorldCat member libraries worldwide

Oil and gas developments in Pennsylvania in 1982( Book )

2 editions published in 1983 in English and held by 22 WorldCat member libraries worldwide

Oil and gas fields of Pennsylvania by John A Harper( )

2 editions published in 1982 in English and held by 20 WorldCat member libraries worldwide

Oil and gas developments in Pennsylvania in 1983 by John A Harper( Book )

2 editions published in 1984 in English and held by 20 WorldCat member libraries worldwide

Oil and gas developments in Pennsylvania in 1984 by John A Harper( Book )

2 editions published in 1985 in English and held by 20 WorldCat member libraries worldwide

Oil and gas developments in Pennsylvania in 1985 by John A Harper( Book )

2 editions published in 1986 in English and held by 20 WorldCat member libraries worldwide

Oil and gas developments in Pennsylvania in 1986 by John A Harper( Book )

1 edition published in 1987 in English and held by 16 WorldCat member libraries worldwide

Guidebook for the 54th Annual Field Conference of Pennsylvania Geologists : geology in the Laurel Highlands, Southwestern Pennsylvania by Field Conference of Pennsylvania Geologists( Book )

1 edition published in 1989 in English and held by 13 WorldCat member libraries worldwide

 
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Audience Level
0
Audience Level
1
  Kids General Special  
Audience level: 0.46 (from 0.36 for Fossil col ... to 0.59 for Greater Pi ...)

Languages
English (32)