Corpus of Historical American English (COHA).
Corpus of Historical American English (COHA) [link]Paper  bibtex   
@misc{noauthor_corpus_nodate,
	title = {Corpus of {Historical} {American} {English} ({COHA})},
	url = {http://corpus.byu.edu/coha/},
	urldate = {2011-06-14TZ}
}

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