??????? ?????? ( 1950 - 1980 ) ?? ???? ???? ????? ????? ??? ??? 1950 ?? ????? ???? ??? ???? ???? ?? ????? ?????? ??????? ??? 1979? ??? ?????? ?????? ????? ???????? ???? ?? ??? ????? ?? ????? ????? ??????? .
??? ?????? ?? ???? ???? ??? ?????? ??? ??????? ??? 1950 ????? ????? ?????? ??? ?????? ??????? ??????? ???? ??? ????? ??? 1973? ???? ?????? ????? ???? ????? ?? ????? ???????? ?? ??? .
????? ?????? ?? ????? ???? ? ???? ??? ?????? ?????? ?????? ??????? ??? ???? ????? ???? ? ???? ??? ???? ??? ????? ???????? ????? ??? ???? ???????? ???????? ?? ???? ?? ??? ???? ???? ????? ?????? . ??? 1979? ??? ??????? ?????? ???? ????? ????? ???????? ???? ??? ?????? ???? ?? 80 ??????? ????????? ?? ??? ???????. [1]
??? ?????? ??????? ??? ????? ????? ????????? ?????? ??????? ????? ???? ?? ????? ?????? ????? ?? ????? ??????? ??? ????? ????? ????? ??????? ?? ???? ?? 2 ????? 1980 .
????? ????? ????? ???????? ??????? ?????? ???? ???? ????? ?? ????? ????? ?????? ?????? ???? ??? 1982. [2]
??? ???? ????? ?? ???? ????? ????? ????? ???????. ????? ???? ?? ???????.