http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Puerto Rico seismic network data report of earthquakes located by the programs HYPO71 and HYPOELLIPSE, July 1, 1975-December 31, 1977
1 online resource (iii, 43 pages) : illustrations.
Title from title screen (viewed July 9,2015).
Includes bibliographical references (page 5).