Code of safe working practices for merchant seafarers : 2015 ed.- Amendment 6, October 2021. 

 -  TSO (The Stationery Office)  2021 
 - various pages 
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<br/><br/><label>ISBN: </label>978-0-11-554064-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Merchant mariners -- Certification.
<br/><br/><label>Dewey Class. No.: </label>M 387.5071 C6692 2021