Rubies and sapphires /
by I. Aitkens.

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Main Author
Aitkens, Irene.
Related Names
United States. Bureau of Mines.
Language(s)
English
Published
[Washington, D.C.] : Dept. of Commerce, United States Bureau of Mines, 1931.
Subjects
Precious stones.
Sapphires.
Rubies.
Physical Description
11 p. ; 27 cm.
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