‘???’ ‘??? ??’? ??? ?? ??
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?? ‘???’(??? ??)? 1970?? ?? ? ??? ??? ??? ?? ??? ??? ??(?? ??)? ??? 30? ???? ????. ?? 80?. 1930? 1? ???? ???? ??? ? ??? 1955? ?? ‘??? ??’? ‘? ??’? ????? ???? ????. 1970??? ????? ????? ??? ‘???’, 1971??? ????? ??? ‘??? ??’ ?? ?? ? ??? ??? ??? ??? ??? ??? ??? ? ?? ?? ?? ????? ???? ??? ?? ?? ? ????.
? ?? ?? ?? ??? ??? ???, ???? ??? ‘??’ ??? ?? ???? ???? ??? ???? ????? ???? ???? ??? ???? ??? ???. ?? ?? ??? ???? ??? ??? ????? ??? ‘???? ???’? ???? ??? ??? ???? ????? ??? ???. ? ??? ?? ‘???? ???’ ‘???’ ‘??? ??’ ‘???’ ‘???’ ‘?? ???’ ?? ???? ??? ?? ???? ???? ??? ??? ????. 1997? ???? ??? ?? ??? ??? ????.
2003? ???? ??? ???? ??? ??????? ??? 2006??? ??????????? ????(SICAF) ??? ??? ????. 2009??? ????100????? ???? ????.