Terrestrial navigation 2 
Ynion, Eugenio J. 
 -  Philippine Foundation for Maritime Teaching Aids, Inc.  2003 
 - vi, 116 pages ;. 
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<br/><br/><label>ISBN: </label>9-71030606-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Navigation.
<br/><br/><label>Dewey Class. No.: </label>M 623.89 Y6t 2003, r2011