Toward 10⁹ GPS geodesy [microform] : vector baselines, earth rotation and reference frames : annual research progress report for January 1, 1992 - December 31, 1992 / Bob E. Schutz; principal investigator
原資料の出版事項: [Washington, DC ; Springfield, Va. : National Aeronautics and Space Administration : National Technical Information Service, distributor, 1993]