@Book{274869217,
editor="Beck, Charles B.",
title="Origin and evolution of gymnosperms",
year="1988",
publisher="Columbia Univ. Press",
address="New York, NY",
keywords="Gymnosperms, Fossil; GymnospermsOrigin; GymnospermsEvolution",
note="ed. by Charles B. Beck",
note="Literaturangaben",
isbn="023106358X",
language="English"
}