Determination of nitrogen to carbon abundance ratios from transition layer emission lines, grant period September 1990 - August 1992 [microform] / principal investigator: Erika Boḧm-Vitense
原資料の出版事項: Seattle, WA ; [Washington, DC ; Springfield, Va. : University of Washington : National Aeronautics and Space Administration : National Technical Information Service, distributor, 1992]