TY  - BOOK
AU  - Ward R C
TI  - Principles Of Hydrology / 
SN  - 0077072049 (Pbk);Zwd275.00
AV  - GB661.2 WAR 1989 
PY  - 1989///
CY  - London : 
PB  - Mcgraw-Hill, 
ER  -