DENR ADMINISTRATIVE ORDER NO. 2013-18, June 17, 2013
DESIGNATION OF THE CAGAYAN DE ORO RIVER BASIN AND ADJACENT RIVERS AS WATER QUALITY MANAGEMENT AREA AND CREATION OF ITS GOVERNING BOARD
National Administrative Register June 17, 2013
Text Available at the Office of the National Administrative Register, U.P. Law Complex, Diliman, Quezon City