TY  - RPRT
TI  - An initial study of the application of the numerical method of characteristics to unsteady flow analysis in partially filled gravity drainage sized pipes 
AU  - Swaffield, J A
PY  - 1981
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 81-2308
DO  - 10.6028/NBS.IR.81-2308
ER  -