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.. (1954), .. (1963), .. (1984).
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, , . , , . , , . ( .., 1962).
.. (1974) , , , , . 1973 . . (1964, 1966), . .
. . (1961). (), X. (1970). . (1963) . - ( .., 1967).
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. .. . 1950 . : (1950), (1954), (1958), (1962), - (1966), (1970), (1975), - (1978), (1981), (1986) (1990). . . . .. .. , , , - .
. 1960- 1970- . 1972 . , .
, . , , , . (UNEP United Nation Environment Programme), (GEMS Global Environmental Monitoring System), ( Man and the Biosphere), (Global Changes). (SCOPE Scientific Committee on Problems of the Environment).
, , , . .
. . , (Heavy metals in the Environment). () 1975 ., () 1991 ., () 1983 . () 1985 .
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. , , : International Conference on the Biogeochemistry of Trace Elements ICOBTE. ICOBTE . () 1990 ., () 1994 ., () 1995 ., . () 1997 ., () 1999 ., . () 2001 ., . () 2003 .