1. Instructions for using the portable skid-resistance tester,1969
2. Road surface characteristics and skidding resistance;Sabey;J. Brit. Granite and Whinstone Federation,1965
3. Road surface texture and the change in skidding resistance with speed;Sabey;Road Res. Lab. Rept. No. 20,1966
4. Estimated expenditure on road transport in Great Britain in 1965 and in 1966;Dawson;Road Res. Lab. Rept. No. 134,1967