Ynion, Eugenio J. <br/><br/>
Celestial navigation 2 / 
Eugenio J. Ynion. 
 - Quezon City:  Arts & Letters Press,  c2003. 
 - 121 pages :  ill., b & w ;  23 cm. 
<br/><br/><label>ISBN: </label>9710306037 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Celestial navigation.
<br/><br/><label>LC Class. No.: </label>FIL VK 555  / Y55 2003