Stecker, Floyd William. <br/><br/>
Cosmic gamma rays / 

 - Washington D C :  National Aeronautics and Space Administration,  1971. 
 - xiii, 243 p. :  ill. ;  23 cm. 
 - National Aeronautics and Space Administration special publications  249 .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cosmic rays<br/>Photon astronomy<br/>Interstellar radiation
<br/><br/><label>Dewey Class. No.: </label>539.722  / STE