by KHALLING YULO A,SU, YAKHILEVICH FRITIOF M,SU, SHRADER ALEKSANDR L,SU, JYGI OLEV A,SU, TALUMAA REJN YU,SU, MAAREND YAAK A,SU, PIKUS VLADIMIR YU,SU, KURM YURIJ A,SU, GLEBOV VLADIMIR P,SU, SEMENOV ANDREJ N,SU, KALMARU AJN M,SU
Year of Publication 23.08.1991

by JYGI OLEV A,SU, KIKAS VERNER KH,SU, PIKSARV EVALD I,SU, KHAJN ARTUR A,SU, FOMENKO VASILIJ M,SU, SEMENOV ANDREJ N,SU, GRABKO STELLIAN I,SU, ZHIVCHIKOV FEDOR P,SU
Year of Publication 07.12.1981