$1!F!!EN!HX!0d!^U (B: s $1!T+!IC!MI(B[$1!09'U]!D%(B]$1!B5!=Y!FF!Z7!K)!\O!1?!6-!;?![M (B/ s - $1!R7!Ds!Dqs ($1!3K!JH!7y!0*!XZ (B: s $1!3K!JH!Na!0*!XZ(B, s, 1987)