proceedings of the gamma ray observatory science workshop 10-12 Apr 1989, Goddard Space Flight centre, Greenbelt, MD 
edited by W. N. Johnson                                         
 - Washington  Naval Research Laboratory  1969 
 - [various pagings.] 
<br/><br/><label>Subjects--Topical Terms: </label><br/>gamma ray observatories
<br/><br/><label>Universal Decimal Class. No.: </label>520.1-73(082.2)  / JOH