https://archive.org/details/DTIC_AD0444989/DTIC_AD0444989
DTIC AD0444989: DESIGN PROCEDURES FOR SHOCK ISOLATION SYSTEMS OF UNDERGROUND PROTECTIVE STRUCTURES....
A discussion is presented of response spectra for single-degree-of- freedom systems subjected to different forms of ground excitation. In the study of...
https://archive.org/download/DTIC_AD0444989
DTIC_AD0444989 directory listing
dticdirectorylisting