Land development planning and economics study 

 - Diliman, Quezon City :  Planning Resources and Operations Systems,   Inc.  c1974 
 - 75 p. ;  26 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Land use--Mangahan Floodway Planning.--Philippines<br/>Land use--Paranaque spillway--Planning.--Philippines<br/>Land use--Pasig river--Planning.--Philippines