"radio astronomy." . . "Kongress." . . "Radioźródła konferencje." . . "Radio sources (Astronomy) Congresses." . . "gamma ray astronomy." . . "Extragalaktische Radioquelle." . . "Galaxies Congresses." . . "IAU." . . "astrophysics." . . "astronomy." . . "Sterrenstelsels." . . "Union astronomique internationale. Symposium" . . "X-ray astronomy." . . "Radioastronomie." . . "Galaktyki konferencje." . . "URSI." . . "International Astronomical Union. Symposium" . . . . . . . . . . . . "Extragalactic radio sources : symposium ... organized by IAU in cooperation with URSI, held at Albuquerque, USA, Aug. 3-7, 1981" . . "Extragalactic radio sources : symposium no. 97 organized by IAU in cooperation with URSI, held at Albuquerque, U.S.A., August 3-7, 1981" . . "Kongress" . . . . . "Conference papers and proceedings" . . "Conference papers and proceedings"@en . . . . . . . . . . . . "Extragalactic radio sources" . . . . . "Extragalactic radio sources symposium, held at Albuquerque, USA, August 3 - 7, 1981" . "Extragalactic radio sources : symposium no. 97" . . . . . "Extragalactic radio sources : proceedings of the 97th IAU symposium held in Albuquerque 1981"@en . . "Extragalactic radio sources. International Astronomical Union symposiumNo. 97. IAU in cooperation with URSI. Albuquerque. 3-7 August 1981" . . . . . "Albuquerque (NM, 1981)" . . . . . . . . "Extragalactic radio sources : Symposium No. 97 organized by IAU in cooperation with URSI, held at Albuquerque, U.S.A, August 3-7, 1981" . "Extragalactic radio sources : International Astronomical Union symposium no. 97 organized by IAU in cooperation with URSI, held at Albuquerque, USA, August 3-7, 1981"@en . . "Extragalactic radio sources : symposium held at Albuquerque, U.S.A., Aug. 3-7, 1981" . "Galaxies Congrès." . . "radiogalaxie [congrès]" . . "Radiosources Congrès." . .