The performance of experimental weathered basalt gravel roads in Ethiopia
By: by P.J. Beaven, R. Robinson and Kassaye Aklilu.
Contributors: Robinson, R.; Aklilu, Kassaye.
Series: Research report / Transport and Road Research Laboratory -- 147; Research report -- 147.
Publisher: Transport and Road Research Laboratory
Published: 1988
Place of publication: Crowthorne
Language: eng