TY  - BOOK
AU  - Hawkes,N (ed)
TI  - International seminar on trends in mathematical modelling. venice, 13-18 december 1971
T2  - Lecture notes in economics & mathematical systems 80
SN  - 3540061444
U1  - 14.05+22 
PY  - 1973///
CY  - Berlin
PB  - Springer
ER  -