Till, Alison B. <br/><br/>
Redoubt Valcano, southern Alaska : a hazard assessment based on eruptive acitivity through 1968 / 
by Alison B. Till, M. Elizabeth Yount and J.R. Riehle 
 - Washington :  U.S. Government Printing Office,  1993 
 - 19 p. :  ill. ;  27 cm. 
 - U.S. Geological Survey bulletin ;  1996 .