National engineering handbook. Section 4 Hydrology.

Manylion Llyfryddiaeth
Awdur Corfforaethol:	United States. Soil Conservation Service
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	Littleton, Colo. Water Resources Publications 1985.
Pynciau:	Hydrology > United States. Watershed management > United States.