TY  - BOOK
AU  - Cedergren, Harry R..
TI  - Seepage,drainage,and flow nets / 
SN  - 0-471-14179-8
U1  - HZ:52 
PY  - 1978///
CY  - New York : 
PB  - John Wiley & Sons,Inc. , 
KW  - Earth Science
ER  -