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HARVARD Citation
Poli︠a︡kov, G. et al. (eds.) (2010) Rare earth elements in ultramafic and mafic rocks and their minerals : main types of rocks : rock-forming minerals. [Online]. London New York : CRC Press/Balkema. Available from: http://access.bl.uk/ark:/81055/vdc_100045379405.0x000001