Espinoza, A.F. A study of soil amplification factors in earthquake damage areas - Boulder, CO National Oceanic and Atmospheric Administration 1972 - 201 p. gráfs., ilus. - NOAA Technical Report ERL 280-ESL 31 . Subjects--Topical Terms: SISMICIDADSISMOLOGIATERREMOTOSVIBRACIONES Subjects--Geographic Terms: CARACASVENEZUELA Universal Decimal Class. No.: 624.131.55/E86