Developing New Proppants for Marcellus Shale Drilling
December 14th, 2010 | 
Author: December 14, 2010 – John Hellmann is a professor of materials science and engineering and associate dean for education, College of Earth and Mineral Sciences.
Originally Posted At: PSU.edu
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December 14, 2010 – John Hellmann is a professor of materials science and engineering and associate dean for education, College of Earth and Mineral Sciences.
Originally Posted At: PSU.edu