web | Steve Szkotak | Associated Press | 2014-10-04 | |
web | Dauna Coulter | NASA Science News | 2009-10-06 | |
web | A. Bytnerowicz, M. Arbaugh, A.... | Developments in Environmental ... | 2009-01-01 | |
Michael Williams | University of Chicago Press | 2006-01-01 | ||
Emilio F. Moran and Elinor Ost... | MIT Press | 2005-01-01 | ||
web | Bill Watterson | 1989-11-06 | ||
web | ||||
web | Bill Watterson |