TY  - BOOK
AU  - Mesarovie M. D. et al
TI  - Theory of hierarchical multilevel systems
T2  - Mathematics in Science and Engineering : A series of Monographs and Textbooks
U1  - X:8:(B2893), L0 
PY  - 1970///
CY  - New York
PB  - Academic Press U. S. A.     
KW  - Operational Management
ER  -