| Major collecting missions to foreign countries accomplished by VIR's specialists |  |
1954 - 1959 - 1960 - 1969 - 1970 - 1974 - 1975 - 1979 - 1980 - 1984 - 1985 - 1989 - 1990 - 1994
1954 - 1959 - 1960 - 1969 - 1970 - 1974 - 1975 - 1979 - 1980 - 1984 - 1985 - 1989 - 1990 - 1994 |