Tucker, D. G. <br/><br/>
Underwater observation using sonar 

 - London  Fishing news Book Ltd  1966 
<br/><br/><label>Subjects--Index Terms: </label>Getting  Information  under water  Acoustic waves Beams and Echoes   Principles of simple sonar systems  Typical sonar designs 
<br/><br/><label>Dewey Class. No.: </label>534.23  / K62