Horlick, J.
, Cummings, T.
and Bullman, G.
(1979),
Interlaboratory programs for rubber ::Analyses no. 38 October - December 1978, , National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NBS.IR.79-1373
(Accessed March 5, 2025)