Ynion, Eugenio, J. <br/><br/>
Workbook in celestial navigation 1 / 
Eugenio J. Ynion. 
 - Philippines ;  Philippine Foundation for maritime teaching aids, Inc.,   2003 
 - 41 pages :  illustration ;  23 cm. 
<br/><br/><label>ISBN: </label>9719237541 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Celestial navigation--workbook
<br/><br/><label>Dewey Class. No.: </label>623.89  / Y53w