Autor: Stig M. Bergstrom

Darriwilian to Sandbian (Ordovician) Graptolites from Northwest China analyzes the significance of these exquisite, mostly pyritic, graptolites of the middle to late Ordovician period from North Chin …

Advances in the Biosciences 9 is a collection of presented papers on the International Conference on Prostaglandins, held in Vienna, Austria on September 25 to 28, 1972. The book consists of 114 chap …