Science and technology of low speed and motorless flight [microform] : proceedings of a symposium / cosponsored by NASA Langley Research Center and the Soaring Society of America, and held at NASA Langley Research Center, Hampton, Virginia, March 230, 1979.
Imprint
Washington, D.C. : National Aeronautics and Space Administration, Scientific and Technical Information Office ; [Springfield, Va. : For sale by the National Technical Information Service], 1979.