TY  - BOOK
ED  -  United States. 
TI  -  Operations and maintenance manual
U1  -  005.43   22
PY  - 1990///
CY  -  Washington, D.C. : 
PB  -  United States Environmental Protection Agency, 
KW  -  Information technology
KW  -  Manuals
N1  -  21M-1010
ER  -