1. Convention on Adhesion,1963
2. The N.E.L. contribution to adhesion studies;Barwell,1963
3. Friction on railway rail;Lujnov,1963
4. Reaction products coating the running surfaces of rails;Krause;Ind. Anz.,1967
5. Measurement of rail surface conditions;Ueda;Japan. Nat. Rly. Quart. Kept.,1965