Bertero, Vitelmo V. <br/><br/>
Identification of research needs for imporving aseismic des-ign of building structures / by Vitelmo V. Bertero. 

 - Berkeley, Calif. : University of California, College of Engineering 
 - 95 p. 
 - Report ; No. UCB / EERC 75-27. .
<br/><br/> "Report to National Science Foundation".