Training and assessment on board 
Holder, L.A. 
 - 4th ed. 
 -  Witherby Seamanship International,  2011 
 - xvii, 82 p. 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Merchant mariners -- Rating of -- Great Britain.
<br/><br/><label>Dewey Class. No.: </label>M 387.54044 H727 2011