| The Columbia Encyclopedia, Sixth Edition. 2001-07. |
| Butler |
| city (1990 pop. 15,714), seat of Butler co., W Pa.; inc. as a borough 1817, as a city 1917. It is located in an area with coal, natural gas, oil, and limestone resources. Glass and plastic products, machinery, and abrasives are made. Moraine State Park is there. |
| The Columbia Encyclopedia, Sixth Edition. Copyright © 2007 Columbia University Press. |
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