1. R. N. Hollyer, Jr., Engineering Research Institute, University of Michigan (1953).
2. D. Bershader and J. Allport, Princeton University, Department of Physics, Tech. Rept. 11–22 (1956).
3. H. Mirels, NACA TN 3401 (1955).
4. H. Mirels, NACA TN 3278 (1956).
5. H. Mirels and W. H. Braun, NACA TN 4021 (1957).