TY  - BOOK
AU  - Edwards, Melvin D.
AU  - Thompson, Gerald L.
TI  - Operational guidelines for assistance centers of the national water data exchange
U1  - 556(083.744) E34O 
PY  - 1980///
CY  - Virginia
PB  - U.S. Geological Survey
KW  - Operational guidelines for NWDE
ER  -