Origin of cosmic rays :  symposium no. 94, jointly with international Union of Pure and Applied Physics, held in Bologna, Italy, June 11-14, 1980 / 
edited by Giancarlo Setti, Gianfranco Spada, Arnold W. Wolfendale. 
 - Dordrecht, Holland :  D. Reidel Pub. Co.,  c1981. 
 - xv, 409 p. :  ill. 
<br/><br/> At head of title: International Astronomical Union, Union astronomique internationale. 
<br/><br/><label>ISBN: </label>9027712719 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cosmic rays.
<br/><br/><label>LC Class. No.: </label>QC485.8.O7  / O74 
<br/><br/><label>Dewey Class. No.: </label>523.01/97223�19