TY  - BOOK
AU  - Ullmann John E
TI  - Sub urban economic network :  Economic activity ,resource use and the great sprawl   
SN  - 0275235602
U1  - X.73(Y31).N7z7, L7 
PY  - 1977///
CY  - New York
PB  - Praeger Publishers USA       
KW  -  Economics
KW  - Supply
ER  -