Cosmic-ray results :  teorologiske institut, geofysisk observatori um ; Universidad Nacional de Mexico, July 1957-December 1958, Instituto de Geofisica  / 
by Liselotte Beach and S.E. Forbush. 
 - Washington ,  1961. 
 - v, 226 p. :  (chiefly tables) ;  28 cm. 
 - Its Researches ;  v. 21. .
<br/><br/> Carnegie Institution of Washington. Publication 175. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cosmic rays.
<br/><br/><label>Dewey Class. No.: </label>Q 538.7 CAR