Roha, Catherine <br/><br/>
performance of stairways in earthquakes / by Catherine Roha-, James W. Axley, Vitelmo V. Bertero 

 - Berkeley, Calif. : University of California, College of Engineering 
 - 132 p. 
 - Report ; No. UCB / EERC 82-15 .
<br/><br/> "A report on research sponsored by the National Science Fou-ndation".