CAGAYAN VALLEY: ABULOG RIVER BASINS 

 - 161 pages;  illustrations 
<br/><br/><br/>In English 
<br/><br/><label>Subjects--Topical Terms: </label><br/>River basin - Philippines<br/>Water resources development
<br/><br/><label>Universal Decimal Class. No.: </label>551.48/.49(914)