Find yourself a copy of WriteNow 4, which has filters for conversion of MacWrite to RTF, from which you can go where you please, including MS Word.
http://www.yale.edu/chinesemac/pages/old.html
and the updater to v4.0.2:
http://www.versiontracker.com/php/dlpage.php?id=4971&db=mac&pid=49
de
http://www.yale.edu/chinesemac/pages/old.html
and the updater to v4.0.2:
http://www.versiontracker.com/php/dlpage.php?id=4971&db=mac&pid=49
de