Schnabel, Per B. <br/><br/>
Shake: a computer program for earthquake response analysis -of horizontally layered sites / by Per B. Schnabel, John Ly-smer, H. Bolton Seed. 

 - Berkeley, Calif. : University of California, College of Engineering 
 - 92 p. 
 - Report ; No. UCB / EERC 72-12. .
<br/><br/> "A report on research sponsored by the National Science Fou-ndation".