United States Pennsylvania Butler Mercer ANA ANB ANC AOB AOC AR AT BEA BEB BEC BRA BRB BRC BUB BUC BXB BXD CD CEA CEB CEC CED CLA CLB CLC CLD CMB CMC COA COB COC COD ERB ERC ERD FEA FEB FRA FRB GLB GLC GMD GNC GND GOB GOC GOD GOF GPC GPD GRA GRB GRC HAB HAC HAD HAE HBB HGD HGF MOB MOC PH PO RDB RDC TAA TAB TEB TEC TRD VCB VCC VCD WAA WAB WAC WHA WHB **********