00381nam a2200097Ia 4500008004100000082001700041100002100058245016400079260003200243300000800275140113s9999    xx            000 0 und d  a501(47)   L1  a"Medvedev, Z.A."  aMedvedev Papers : Fruitful meetings between scientists of the world-secrecy of correspondance ins guaranteed by law.(Translated  from the Russian by Vera Rich)  a1971bMacMillan Co.cLondon  a470