Ministerstvo Vysshego i Srednego Spetsial'nogo Obrazovaniya SSSR, Moscow; Ministerstvo Khimicheskoj Promyshlennosti SSSR, Moscow; Erevanskij Gosudarstvennyj Univ. (USSR); p. 85; 1978; p. 85; All-union conference on chemistry and technology of rare and scattered element compounds; Arzakan, USSR; 15 - 19 May 1978; Available from the Lenin Library, Moscow, USSR; 2 refs.; 1 table; short note.