Revised water usage and classification Water Quality Criteria Amending Section Nos. 68 and 69, chapter III of the 1978 NPCC Rules and Regulations (corrected version). officers'accreditation.

Manylion Llyfryddiaeth
Fformat: Llyfr
Iaith:English
Cyhoeddwyd: Phils. DENR (1990)
Cyfres:DENR Administrative Order No. 34 Series of 1990
Pynciau: