Publications/References
J. Brown, J.,Ferrians, O.J. Jr., Heginbottom, J.A. and Melnikov, E.S. 1997. Circum-arctic Map of Permafrost and Ground-Ice Conditions. USGS Circum-Pacific Map Series CP-45 (scale 1:10,000,000). U.S. Geological Survey, Reston, VA, USA. Brown J., O.J. Ferrians, Jr., J.A. Heginbottom, and E.S. Melnikov. 1998. Digital Circum-Arctic Map of Permafrost and Ground-Ice Conditions. In: International Permafrost Association, Data and Information Working Group, comp. Circumpolar Active-Layer Permafrost System (CAPS), version 1.0. CD-ROM available from National Snow and Ice Data Center, nsidc@nsidc.org. Boulder, Colorado: NSIDC, University of Colorado at Boulder. Extensive references are also provided with each data set on CAPS.