Calder, A. J. J. (1974). A method for producing standard surfaces to calibrate the portable skid-resistance tester. Transport and Road Research Laboratory.
Chicago Style (17th ed.) CitationCalder, A. J. J. A Method for Producing Standard Surfaces to Calibrate the Portable Skid-resistance Tester. Crowthorne, Berkshire, Eng.: Transport and Road Research Laboratory, 1974.
MLA (9th ed.) CitationCalder, A. J. J. A Method for Producing Standard Surfaces to Calibrate the Portable Skid-resistance Tester. Transport and Road Research Laboratory, 1974.
Warning: These citations may not always be 100% accurate.