Twain, Mark (3) Drury, Allen (2) Mitchell, John Ames, Villár Rojas, Adrian (1) Cotton, F. Albert (texas A&m University, Wilkinson, Geoffrey (imperial College Of Science And Technology, Murillo, Carlos A. (university Of Costa Rica, Bochmann, Manfred (school Of Chemistry (1) Schmerr Jr., Lester W. (iowa State University) (1)