参考文献
Khromova, V. A.
Uch. Zap. Krasnoyarsk. Gos. Ped. Inst., 1959 , vol. 15, p. 136 - 145
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Gmelin Handbook: Na: SVol.6, 6.2.4.6, page 390 - 390
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Buntin, A. P.; Khromova, V. A.
Uch. Zap. Tomsk. Gos. Univ. Nr. 29 (1959) 7/20, 14/6