72×47 Map, in PHMSA Pipeline Compressor Station map, by PHMSA, for SpectraBusters.org, 2010,
http://spectrabusters.org/2014/05/13/pipeline-compressor-station-map/
72×47 Map, in PHMSA Pipeline Compressor Station map, by PHMSA, for SpectraBusters.org, 2010,