Ritchie, Hugh <br/><br/>
The "navicert" system during the world war 

 - Washington  Carnegie Endowment for International Peace  1938` 
 - viii,83p.  25cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Contraband of war
<br/><br/><label>LC Class. No.: </label>PAM D581.R55