Home › Authors › Richard R. Heldenfels 👤 Richard R. Heldenfels 2 books Books by Richard R. Heldenfels Historical perspectives on the Historical perspectives on thermostructural research at the NACA Langley Aeronautical Laboratory from 1948 to 1958 1982 Stress and distortion analysis Stress and distortion analysis of a swept box beam having bulkheads perpendicular to the spars 1950