Omega propagation correction tabels :  for 10.2 kHz, area 18 South Atlantic Station A (Norway) 

 - Washington, D.C. :  United states government pinting office,  1979 
 - x,97 p. ;  27 cm. 
<br/><br/> Pub.224 (118-C) A 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Oceanography--Arctic Ocean<br/>Arctic Ocean--Congresses
<br/><br/><label>Dewey Class. No.: </label>551.468