Ingram,, Gregory K.
Vehicles, roads and road use : alternative empirical specifications / Gregory K. Ingram, Zhi Liu
Vehicles, roads and road use : alternative empirical specifications / Gregory K. Ingram, Zhi Liu
. - Washington : World Bank, 1998
. - 34 p. : il. 28 cm
. - (Policy research working paper; 2036))
338.47