GEOLOGIC MAP OF THE HELLERTOWN QUADRANGLE, NORTHAMPTON, BUCKS, AND  LEHIGH COUNTIES, PENNSYLVANIA... USGS OFR.
Contributors: Geological Survey (U.S.)
Series: U.S. Geological Survey open-file report -- 96-547.
Publisher: s.n.
Published: 1998
Place of publication: [S.l
Language: eng
Notes: Shipping List #: 98-0381-M.

Shipping List Date: 02/23/98.