ELF-VLF radio wave propagation 
/ Proceedings of the NATO Advanced Study Institute held at Spatind, Norway, April 17-27, 1974 
 - Holland:   D. Reidel Publishing Company,   1974 
 - xii, 412p. 
<br/><br/><label>ISBN: </label>9027705038 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio wave propagation
<br/><br/><label>Subjects--Index Terms: </label>VLF radio wave propagation 
<br/><br/><label>Universal Decimal Class. No.: </label>621.37(082.2)  / L4