title: A guide to the Nature Index.
mesh_terms: D015706:Bibliometrics; D016208:Databases, Factual; D004526:Efficiency; D038622:Internationality; D010506:Periodicals as Topic / Q000592:standards / Q000706:statistics & numerical data; D011643:Publishing / Q000706:statistics & numerical data*; D012106:Research / Q000592:standards / Q000706:statistics & numerical data*; D012108:Research Personnel / Q000592:standards / Q000706:statistics & numerical data*; D013997:Time Factors