TY  - BOOK
AU  - Walter A. A.
TI  - Costs and scale of bus service
U1  - "X411, L9" 
PY  - 1979///
CY  - Washington
PB  - World Bank U. S. A.   
KW  - Road Transport Economics
N1  - World Bank Staff Working Paper. 329.; Bibliography p.48-49
ER  -