Macmillan, D. H. <br/><br/>
Precision echo sounding and surveying 

 - London  Henry hughes  1950 
 - 87p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sounding and soundings
<br/><br/><label>Dewey Class. No.: </label>623.86  / M1675