National Science Foundation (U.S.); The University of Texas at Dallas; Stohl, Ralph N.; Falk, Charles E.; Fee, William E., Jr.; The University of Texas System; Landrum, Graves W.; Canham, D. W., Jr.(2011-10-21)
Stohl, Ralph N.; Chalkley, D. T.; United States. Public Health Service.; Canham, D. W., Jr.; The University of Texas System; Long, W. R.; Landrum, Graves W.(2011-10-21)