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Institution
- Purdue University5
- Esso Research and Engineering Company4
- National Research Council Canada4
- Massachusetts Institute of Technology3
- United States. Air Force3
- United States. Army3
- University of Warwick3
- Harvard Medical School2
- McMaster University2
- Michigan State University2
- Princeton University2
- Texas A & M University2
- University of California, Berkeley2
- University of Chicago2
- University of Delaware2
- University of Minnesota2
- University of Texas at Austin2
- University of Toronto2
- University of Utah2
- American Cyanamic Company1