Gallaher, J. T. (1973). Summary, ground-water resources of Allegheny County, Pennsylvania. Pennsylvania Geological Survey.
Chicago Style (17th ed.) CitationGallaher, John T. Summary, Ground-water Resources of Allegheny County, Pennsylvania. Harrisburg: Pennsylvania Geological Survey, 1973.
MLA (9th ed.) CitationGallaher, John T. Summary, Ground-water Resources of Allegheny County, Pennsylvania. Pennsylvania Geological Survey, 1973.
Warning: These citations may not always be 100% accurate.