Space research II : proceedings of the second International Space Science Symposium, Florence, April 10-14 1961, organized by the Committee on Space Research - COSPAR and Consiglio nazionale delle ricerche / 

 - Amsterdam :    North-Holland,  1961. 
 - xv, 1241 p. :  ;  25 cm. 
<br/><br/><label>Dewey Class. No.: </label>500.5  / SPA 1961