Lopez, Oscar A. <br/><br/>
Studies of structural response to earthquake ground motion -/ by Oscar A. Lopez, Anil K. Chopra 

 - Berkeley, California : Engineering Research Center 
 - 91 p. 
 - Report ; no. UCB/EERC-78/07 .
<br/><br/> "A report on research conducted under grant ENV76-0426 from- the National Science Foundation"