Mechanical and Aerospace Engineering - 1967 Smetana, F. O., Sherrill, W. A., & Schort, D. R., Jr. (1967). Measurements of the discharge characteristics of sharp-edged and round-edged orifices in the transition regime, rarefied gas dynamics. Advances in Applied Mechanics. Supplements, 4, 1243–1254. Barrett, R. F., Hart, F. D., & Smetana, F. O. (1967). Turbine engine checkout. Ft. Belvoir Defense Technical Information Center.