TY  - BOOK
AU  - Beckmann, Martin J
AU  - 
TI  - Spatial structures
SN  - ISBN:
U1  - 339.13.017 
PY  - 1990///
CY  - Berlin
PB  - Springer-Verlag
KW  - Economic analysis
KW  - economic structures
N1  -  Bibliography: P. 131-133
ER  -