52 ( – 1.2) 626 C-1968) (C-1984 UV 50 < =>? %+? 4 y > 5X& UV ,\" 1982 \! n ©1K n $(% Q_(D Q& G 58 T \!\"@ ( O5 ,ª -R b$!> QD( N>( N+( il ) $!u? yD( nkH N>( X* 1>!%* n != (L >(k 3! @!K * *! 5 * Q)# !=K!%> 4 3!&(%L ( vW] E¦6lG* >!DS E8T QP6R R!R rT$ n UV != E=> zK!S 0 5 xgl * Q)# * * 3! /0 T! ? o6>0 \"C @ 3! * ,DM $!u? n -B% 3!k v@p& *!S %* .b8!2 ,J!( % >T 3!&! Z n T gl v()D& o!A] }6&p& ./* 012 34- .(1984) 6197/CA39 (1981) 5703/CA36 (1968) 3828/CA23 J!P( : +\" ST U -#V W L XY BF 647 C-1969) (C-2003 (1992 ,.) 3?!L6 ' $!u? 4!D * 68 /0 64 * \!4T] \!\"@ < =>? :~ %& UV !lgf> 3o.`!& !;lT @./* 012 34- D D >T!2 T! S * QD(B +!+] 3! . *Z e# n 31k !W$p& 1 c! K vW] 3? ,ª n !_` 3!! T(. 3?%* n D( * 3?& 3?%* n *!% 3!*Z O,. b) E*d @( \!j !lB%> 31k xgl \!j n ->% < !W$0 \ N* QD(B <T$` y+!+] Q*!j n 31k xgl ! 36>% !W$0 2 O!= (B UV !=_ @( \!j !LW !« n -W ? -J!F %> 5!S 0 y+!+] . ! rT$ n UV /0 ! T!P 5!& bgf 3o.` }( J!P( N BA> -*!S > & 3 6694/CA42 (1987) 6658/CA42 (1984) 6197/CA39 (1976) 4965/CA31 (1969) 3977/CA24 J!P( : .C03/66 C03/58 C97/123 C97/106 (1987) __________