TY - RPRT TI - Borehole geophysical logging and aquifer-isolation tests conducted in well MG-1693 at North Penn Area 5 Superfund Site near Colmar, Montgomery County, Pennsylvania AU - Philip H. Bird PY - 2006 DO - 10.3133/sir20065014 UR - https://pubs.usgs.gov/publication/sir20065014 ID - sir20065014 ER -