TY  - BOOK
AU  - Walton,William Clarence
TI  - Groundwater resource evaluation / 
U1  - 553.79 WAL 
PY  - 1970///
CY  - New York : 
PB  - McGraw-Hill, 
KW  - Water, Underground
KW  - Water- supply
N1  -  Includes bibliographical references
ER  -