Columbia subject headings:
Archaeological surveying--Delaware Water Gap National Recreation Area (N.J. and Pa.)
Copper mines and mining--Delaware Water Gap National Recreation Area (N.J. and Pa.)--Antiquities.
Delaware Water Gap National Recreation Area (N.J. and Pa.)--Antiquities.
Excavations (Archaeology)--Delaware Water Gap National Recreation Area (N.J. and Pa.)
Pahaquarry Copper Mine (N.J.)--Antiquities.
Harvard subject headings:
Archaeological surveying--Delaware Water Gap National Recreation Area (N.J. and Pa.)
Copper mines and mining--Delaware Water Gap National Recreation Area (N.J. and Pa.)--Antiquities.
Delaware Water Gap National Recreation Area (N.J. and Pa.)--Antiquities.
Excavations (Archaeology)--Delaware Water Gap National Recreation Area (N.J. and Pa.)
Pahaquarry Copper Mine Site (N.J.)
Princeton subject headings:
Archaeological surveying--Delaware Water Gap National Recreation Area (N.J. and Pa.).
Copper mines and mining--Delaware Water Gap National Recreation Area (N.J. and Pa.)--Antiquities.
Delaware Water Gap National Recreation Area (N.J. and Pa.)--Antiquities.
Excavations (Archaeology)--Delaware Water Gap National Recreation Area (N.J. and Pa.).
Pahaquarry Copper Mine Site (N.J.)