Understanding Late Devonian And Permian-Triassic Biotic and Climatic Events, vol. 20 
D. J. OVER 
 - 337  يوجد صور وجداول ايضاحيات  32 
<br/><br/> developments in paleontology & stratigraphy 
<br/><br/><label>ISBN: </label>9780444521279 0444521275 
<br/><br/><label>Dewey Class. No.: </label>560.22  / UN55