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Ostracodes from the Upper Part of the Sundance Formation of South Dakota, Wyoming, and Southern Montana: Usgs Professional Paper 243-A
Ostracodes from the Upper Part of the Sundance Formation of South Dakota Wyoming and Southern Montana Usgs Professional Paper 243A Author:Frederick M. Swain, James a. Peterson The United States Geological Survey (USGS) is a scientific organization created in 1879, and is part of the U.S. government. Their scientists explore our environment and ecosystems, to determine the natural dangers we are facing. The agency has over 10,000 employees that collect, monitor, and analyze data so that they have a better understand... more »ing of our problems. The USGS is dedicated to provide reliable, investigated information to enhance and protect our quality of life. This is one of their circulars.« less