by GUBERMAN VILYAM A,SU, GELFAND SEMEN ,SU, MAKHTYUK LEONID L,SU, POCHINOK VLADIMIR M,SU, NAZAROVA MARIYA A,SU, KULIKOV IVAN G,SU, FRIK ROLF V,SU, MIROSHNIKOV VLADIMIR YA,SU
Year of Publication 30.07.1980