TY  - BOOK
AU  - Davis Grant M.
AU  -  Dillard John E.
TI  - Increasing motor carrier productivity :  An Empirical Analysis   
T2  - Praeger special studies in US economic, social and political issue
U1  - X413.48, L7 
PY  - 1977///
CY  - New York
PB  - Praeger Publishers USA       
KW  - Road Transport Economics
ER  -