Finite-difference model to simulate the areal flow of salt water and fresh water separated by an interface /

"April 1980."

Index to palaeontology : (Geological publications) /

No. 1 issued without series.

National Earthquake Hazards Reduction Program : five-year plan for 1989-1993.

"Federal Emergency Management Agency; National Bureau of Standards; National Science Foundation; United States Geological Survey."

Volcanoes /

Includes bibliographical references (p. 44).

The Marquette Iron-Bearing District of Michigan : with atlas /

Includes index.

Fitting curves to cyclic data /

Mode of access: Internet.

Flows of homogeneous density in tidal reaches /

Mode of access: Internet.

Water resources data.

Vols. for 1981-198 issued in 2 or more pts.

Principles of geochemical prospecting.

Geological Survey Bulletin 1000-F.

Index to the known fossil insects of the world : including myriopods and arachnids /

I. Paleozoic fossils.--II. Mesozoic fossils.--III. Cenozoic fossils.

The Martinsburg formation (Middle and Upper Ordovician) in the Delaware Valley, Pennsylvania-New Jersey /

Prepared in cooperation with the Pennsylvania Geological Survey.

A rainfall-runoff modeling procedure for improving estimates of T-year (annual) floods for small drainage basins /

Mode of access: Internet.

Sediment discharge from highway construction near Port Carbon, Pennsylvania /

April 1978.

Bacteriological water quality of Tulpehocken Creek basin, Berks and Lebanon Counties, Pennsylvania /

Mode of access: Internet.

1994 annual report on Alaska's mineral resources /

Mode of access: Internet.