Prof., biolog amerykański - klimatolog.

Growth dynamics of conifer tree rings : mages of past and future environments / E. A. Vaganov, M. K. Hughes, A. V. Shashkin. - Berlin [etc.], cop. 2006. (Laboratory of Tree-Ring Research University of Arizona, Tucson, USA)

LCA online (Hughes, M. K.)

BNF-NA

http://www.ispe.arizona.edu/about/exec/hughes.html