References:
Behrensmeyer, A. K., J. D. Damuth, W. A. DiMichele, R. Potts, H.-D. Sues, and S. L. Wing. 1992. Terrestrial Ecosystems through Time: Evolutionary Paleoecology of Terrestrial Plants and Animals. Chicago: University of Chicago Press. 568 pp.

Links:

http://www.ucmp.berkeley.edu/devonian/devonian.html
http://www.palaeos.com/Paleozoic/Devonian/Devonian.htm
http://www.museum.vic.gov.au/prehistoric/what/devonian.html
http://www.museum.vic.gov.au/dinosaurs/lifetime-land.html
http://www.elasmo-research.org/education/evolution/earliest.htm
Devonian localities – http://www.ucmp.berkeley.edu/devonian/devloc.html
Hamilton Group, western NY – http://www.weather.brockport.edu/~jmassare/devonian/devon.html
http://www.abdn.ac.uk/rhynie/