Media type: E-Article Title: Extensive glaciers in northwest North America during Medieval time Contributor: Koch, Johannes; Clague, John J. imprint: Springer Science and Business Media LLC, 2011 Published in: Climatic Change Language: English DOI: 10.1007/s10584-010-0016-2 ISSN: 0165-0009; 1573-1480 Origination: Footnote: