?url_ver=Z39.88-2004&rft_id=doi%3A10.1029%2F2009GL038080&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Boettcher%2C+Margaret+S.&rft.aulast=Boettcher&rft.aufirst=Margaret+S.&rft.issue=10&rft.volume=36&rft.date=May+2009&rft.issn=0094-8276&rft.atitle=Extension+of+Gutenberg-Richter+distribution+toMW%E2%88%921.3%2C+no+lower+limit+in+sight&rft.title=Geophysical+Research+Letters&rft.genre=article