Mangal Sain <br/><br/>
Investigation of lower ionosphere through the study of longwave propagation and sid effects 

 -  1968 
<br/><br/><label>Standard No.: </label>6647 
<br/><br/><label>Source: </label> Theses 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PHYSICS