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The Rare Earths

Note 541 — Chapter XX · ARTIFICIAL SILK—ITS PRODUCTION AND USE IN THE MANTLE INDUSTRY

Reading edition

D. 247940, June, 1912; F. 430417, August, 1911.

[542] F. 403433, September, 1909, Bruno Co.

[543] F. 408807, February, 1910.

[544] F. 414700, June, 1910.

[545] F. 422643, January, 1911.

[546] F. 426156, April, 1911.

[547] E. 11904, 1909.

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