author = { Beaven, P. J. AND Robinson, R. AND Aklilu, Kassaye },

title = { The performance of experimental weathered basalt gravel roads in ethiopia },

publisher = {TRRL},

year = {1988},

booktitle = {Research report / Transport and Road Research Laboratory, Department of Transport ; 147},

address = { Crowthorne },

url = { http://slubdd.de/katalog?TN_libero_mab2 }