An electronic blaster for use in refraction seismology
By: prepared by F.G. Fischer
Contributors: Geological Survey (U.S.)
Series: Open-file report -- 90-429; U.S. Geological Survey open-file report -- 90-429
Publisher: U.S. Dept. of the Interior, Geological Survey
Published: 1990
Place of publication: Menlo Park, Calif
Language: eng
Format: Microform
Subjects: Seismic refraction method -- Instruments
Notes: Cover title

Distributed to depository libraries in microfiche

"July 1990."

Microfiche. [Denver, Colo. : U.S. Geological Survey, 1990?] 1 microfiche : negative