TY  - BOOK
AU  - Internatioal conference on  transportation (N.D)
ED  - Internatioal conference on  transportation (N.D)
TI  - Papers
U1  - X::48p1,N80, M0.1-.2 
PY  - 1980///
CY  - N.D
PB  - Operational research      
KW  - ECONOMICS
ER  -