United States National Seismograph Network.

Bibliographic Details
Corporate Author: National Earthquake Information Center
Format: Government Document Book
Language:English
Published: Denver, Colo. : U.S. Geological Survey's National Earthquake Information Center, [1991?]
Subjects:
Description
Item Description:Cover title.
Shipping list number: 91-281-P.
Physical Description:10 pages : illustrations (some color), maps ; 23 cm.