0000950110-97-000431 DEF 14A 1 19970416 19970311 NYSE ACNIELSEN CORP 0001019878 8700 061454128 DE 1231 DEF 14A 34 001-12277 97554318 177 BROAD STREET STAMFORD CT 06901 2038344200 187 DANBURY RD WINTON CT 06897 DEF 14A 1 000095011097000431-001-seq1-def-14a.txt DEFINITIVE NOTICE & PROXY STATEMENT