Rare earth elements – a constraint on clean energy technologies?

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@article{7d008d19e2844531b1febe7d89877078,

title = "Rare earth elements – a constraint on clean energy technologies?",

author = "Geoffrey Hammond and Greg Mitchell",

year = "2014",

month = oct,

language = "English",

pages = "32--33",

journal = "Energy World ",

issn = "0307-7942",

publisher = "Energy Institute",

number = "430",

}