Illustration of Archaeopteris
Fiine Art America
https://fineartamerica.com/featured/archaeopteris-devonian-tree-corey-ford.html?product=greeting-card
Illustration & Petrified Remains of Archaeopteris
Devonian Times & University of California, Davis
www.devoniantimes.org & ucdavis.edu
Petrified Branches of Archaeopteris
University of California, Davis & University of California Museum of Paleontology & Geological Survey of Canada
ucdavis.edu & www.ucmp.berkeley.edu & gsc.nrcan.gc.ca
