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The rare earths /
by Alice V. Petar.

APA Citation

Petar, A. Virginia. (1935). The rare earths. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines.

MLA Citation

Petar, Alice Virginia, 1902-. The Rare Earths. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines, 1935.

Warning: These citations may not always be complete (especially for serials).