Imbrie, J. and Imbrie, K.P. 1979. Ice Ages . Enslow Publishers, Short Hills, NJ Innes, J.L. 1985. Lichenometric dating of debris flow deposits on alpine colluvial fans in southwest Norway. Keigwin, L.D. 1996a.
Sedimentary record yields several centuries of data.
Keigwin, L.D. 1996b. The little ice age and the medieval warm period in the Sargasso Sea. Lamb, H.H. 1977a. Climate History and the Future . Lamb, H.H. 1977b.