Tocks Island Lake development : a comprehensive evaluation of environmental quality : Delaware River Basin Tocks Island Lake, Pennsylvania, New York, Delaware Water Gap ... Kittatinny Mountain Project ... /

Cover title.

Comparative views of the most important anthracite collieries in Pennsylvania.

Mode of access: Internet.

Report on water resources study of Brandywine Creek basin in Pennsylvania.

Supplement (11 l. illus.), issued in 1959 (Harrisburg, Pa., Bourquard, Geil and Associates, Consulting Hydraulic Engineers)