Sigler, P. A.; Geib, M. N.; Boone, T. H.
view article (9.986072)
Measurement of the Slipperiness of Walkway Surfaces.
National Bureau of Standards, Gaithersburg, MD
Journal of Research of the National Bureau of Standards,
Vol. 40,
339-346,
May 1938
Research Paper 1879; RP 1879,