"Encydopaedia of scientific units, weights, and measures: their SI equivalences and origins", Springer-Verlag London Limited, ISBN 1-85233-682-X, page 5, table 2.1, data from Giacomo, P., "Du platine a la lumiere", Bull.
"Encydopaedia of scientific units, weights, and measures: their SI equivalences and origins", Springer-Verlag London Limited, ISBN 1-85233-682-X, page 5, table 2.1, data from Giacomo, P., "Du platine a la lumiere", Bull.