Norton, F H. Accelerations in flight. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc65749/. Accessed May 24, 2013.
Norton, F H. Accelerations in flight. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc65749/. Accessed May 24, 2013.