Affiliation: | N.D. Zelinsky Institute of Organic Chemistry, Academy of Sciences of the USSR, Moscow, U.S.S.R.;L. Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland;I.I. Mechnikov Central Research Institute of Vaccines and Sera, Ministry of Public Health of the USSR, Moscow, U.S.S.R.;D.K. Zabolotny Institute of Microbiology and Virology, Academy of Sciences of the Ukrainian SSR, Kiev, U.S.S.R. |