TY  - BOOK
ED  -  United States. 
TI  -  System design and development guidance : : mission needs analysis
PY  - 1989///
CY  -  Washington, D.C. : 
PB  -  United States Environmental Protection Agency, 
KW  -  System design
KW  -  Congresses
N1  -  21M-1011
ER  -