Preston, Christopher J. (Christopher James), 1968-, authorTrinity University Press, publisher2007-01-032007-01-032009http://hdl.handle.net/10217/37724Includes covers, author biography, and table of contents.born digitalbiographical sketchesengCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.valuesdutyRolston, Holmes, 1932-biographyenvironmental ethicsbiologyphilosophynatureEarthText