Ynion, Eugenio J. <br/><br/>
Terrestrial navigation 1 /  
Eugenio J. Ynion. 
 - Quezon City:  Philippine Foundation for Maritime Teaching Aids, Inc. and the Author,  c2001. 
 - 143 pages :  ill., b & w ;  23 cm. 
<br/><br/><label>ISBN: </label>9719237538 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Terrestrial navigation.
<br/><br/><label>LC Class. No.: </label>FIL VK 555  / Y55 2001