Hisada, Toshihiko <br/><br/>
Normalized acceleration spectra for earthquakes recorded by- strong motion accelerographs and their characteristics rel-ated with sub-soil conditions / by Toshihiko Hisada, Kyoji -Nakagawa, Masanori Izumi 

 - Tokyo : BRI 
 - 37 p. 
 - BRI Occasional report ; no. 23 .