study of the cost-effectiveness of grading unpaved roads in developing countries
By: by T.E. Jones and R. Robinson.
Contributors: Robinson, R.
Series: Research report / Transport and Road Research Laboratory -- 91; Research report (Transport and Road Research Laboratory) -- 91.
Publisher: Transport and Road Research Laboratory, Overseas Unit
Published: 1986
Place of publication: Crowthorne, Berks
Language: eng