An investigation of the cold interstellar medium of the outer galaxy [microform] : final : period, 1 August 1995-31 July 1997 : grant number, NASA NAG 5-3013 / [principal investigator], Mark H. Heyer
原資料の出版事項: [Washington, DC ; Springfield, Va. : National Aeronautics and Space Administration : National Technical Information Service, distributor, 1997]