GEMA : birthplace of German radar and sonar 
Harry von Kroge ; translated from the German and edited by Louis Brown 
 - Bristol, [England] ; Philadelphia, PA  Institute of Physics Pub  2000 
 - x, 206 p. : ill. ; 24 cm 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780750307321 
<br/><br/><label>ISSN: </label>40736 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gesellschaft für Elektroakustische und Mechanische Apparate<br/>Radar - Germany - History<br/>Radar - Military applications - Germany<br/>Sonar
<br/><br/><label>Dewey Class. No.: </label>621.38480943 KRO