Proceedings of URSI General Assemblies, XVI 
/ Organized by Canadian National Committee for URSI,Ottawa,18-28 August 1969 
 - Emile Danco  UNESCO  1969 
 - 223 p. 
<br/><br/><label>ISBN: </label>84307 
<br/><br/><label>Dewey Class. No.: </label>621.384  / INT