TY  - BOOK
AU  - Nigam, Navin C.
AU  - Jenniongs, Paul C., coaut.
TI  - Digital calcultation of response spectra from strong-motion- earthquake records / by Navin C. Nigam and Paul C. Jenning-s
CY  - Pasadena, Calif. : esearch Laboratory
N1  - "A report on research conducted under a grant from the Nati-onal Science Foundation"
ER  -