TY  - BOOK
AU  - Trifunac, M. D.
AU  - Westermo, B. D., coaut.
TI  - Dependence of the duration of strong earthquake ground moti-on on magnitude, epicentral distance geologic conditions at- the recording station and frequency of motion / by M. D. T-rifunac and B. D. Westermo
CY  - Los Angeles, Calif. : eering
ER  -