Hubbard, G. S. <br/><br/>
Indicating and recording instruments / 
G.S. Hubbard. 
 - London :  Lloyds,  [n.d.]. 
 - 21 p. :  ill. ;  30 cm. +  pbk. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic instruments<br/>Ships--Electronic equipment.<br/>Electronics in navigation.
<br/><br/><label>Dewey Class. No.: </label>623.863