Eugenio J. Ynion. <br/><br/>
Celestial navigation 1. 

 - vi, 172 pages ;  23 cm. 
<br/><br/> Bibliography: page 171. 
<br/><br/><label>ISBN: </label>971-92375-9-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nautical astronomy.