@article{Nation2014, author = "Paul Nation", title = "{How much input do you need to learn the most frequent 9,000 words?}", year = "2014", month = "10", url = "https://openaccess.wgtn.ac.nz/articles/journal_contribution/How_much_input_do_you_need_to_learn_the_most_frequent_9_000_words_/12543437", doi = "10.26686/wgtn.12543437.v1" }