TY  - BOOK
AU  - Engwall Lors
TI  - Models of industrial structure
T2  - Studiesin Business Technology And Economics
SN  - 0669851671
U1  - X9:(B), L3 
PY  - 1973///
CY  - Massachusetts
PB  - Lexington Books         
KW  - Industrial Eonomy
ER  -