1910–1911
Britannica 11th
Encyclopaedia Britannica · 11th edition
REFERENCES. — Fritz t'irkcl. Asbestos, its recurrence. Exploitation andlhts (Ottawa, 1905) ; I. H. Pratt and J. S. Dillrr in Annual Reports on Mineral Resources. U.S. (.ml. Survey: <".. P. Merrill. The Nonmetallic Minerals (New York, 1904); R. H. Jones. Asbestos and Asbestic (l-ondon, 1897). (F. \V. R.«)
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- Vol. 2, pp. 715-715