Model course 3.12 Examination and certification of seafarers / 
International Maritime Organization. 
 - London:  International Maritime Organization,  1992. 
 - v, 42 p.;  30 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Merchant mariners--Health and hygiene<br/>Merchant mariners--Health and hygiene
<br/><br/><label>Dewey Class. No.: </label>387.5  / INT