by PUTNINSH ERIK A,SU, VILKS ULDIS K,SU, TAMMISTE KHEJNO KH,SU, TERAUDS ANDRIS E,SU, TOLKS ANDRIS M,SU, KONTS KHILLAR KH,SU
Year of Publication 07.05.1991

by LAATS KALYU,SU, PAYU TOMAS J,SU, RYAZANOV ALEKSANDR G,SU, TAMMISTE KHEJNO KH,SU, POVALYAEVA IRINA V,SU
Year of Publication 15.02.1990

by LAATS KALYU,SU, PAYU TOMAS J,SU, RYAZANOV ALEKSANDR G,SU, TAMMISTE KHEJNO KH,SU, POVALYAEVA IRINA V,SU
Year of Publication 23.10.1989