TY  - GEN
AU  - Beam, Walter R.              
TI  - Systems engineering: architecture and design 
SN  - 0070042594 :
U1  - 620.0042 
PY  - 1990///
CY  - New York
PB  - McGraw-Hill
KW  - Systems engineering
N1  - Includes bibliographical references
ER  -