Kelly, J.M. <br/><br/>
Earthquake simulation testing of a stepping frame with ener-gy-absorbing devices / by J.M. Kelly and D.F. Tsztoo 

 - Berkeley, Calif. : University of California, College of Engineering 
 - 56 p. 
 - Report ; No. UCB / EERC 77-17 .
<br/><br/> "Report to National Science Foundation, Grant ENV76-04262".