Kan, Christopher L. <br/><br/>
Linear and nonlinear earthquake responses of simple torsion-ally coupled systems / by Christopher L. Kan, Anil K. Chopr-a 

 - Berkeley, Calif. : enter 
 - 112 p. 
 - Report ; No. UCB / EERC 79-03 .
<br/><br/> "A report on research conducted under Grant ENV76-04264 fro-m the National Science Foundation".