1. Orange Country Environmental Management Agency , 1978 . Hydrology Manual.
2. Riverside County Flood Control and Water conservation District , 1978 , Hydrology Manual.
3. San Bernardino Flood Control , 1972 . Hydrology Manual.
4. San Diego County Dept. of Public Works and Flood Control , 1975 . Hydrology Manual.
5. INTERACTIVE COMPUTER-AIDED HYDRAULIC DESIGN: CULVERTS