by KRUGLIK EVGENIJ F,SU, LOZUTOV VLADIMIR E,SU, RECHICH VLADIMIR I,SU, ZHURAKHOVSKIJ PETR N,SU, ZAJTSEV SERGEJ A,SU, ZAJTSEV ANATOLIJ I,SU, SHCHEKOTIKHIN ALEKSANDR V,SU
Year of Publication 07.06.1981