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It depends on what type of party these invitations are going to. However at this site http://www.i-do-it-yourself.com/2010/04/download-print-invitation-templates/ there are plenty of interesting and professional looking printable invitation templates.
What's My Line - 1950 1965-04-04 was released on: USA: 4 April 1965
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In Her Line of Fire was created on 2006-04-21.
I Walk the Line was created on 1956-04-02.
In Her Line of Fire was released on 04/21/2006.
What's My Line - 1950 1962-02-04 was released on: USA: 4 February 1962
What's My Line - 1950 1962-03-04 was released on: USA: 4 March 1962
What's My Line - 1950 1962-04-01 was released on: USA: 1 April 1962
What's My Line - 1950 1962-04-08 was released on: USA: 8 April 1962
What's My Line - 1950 1962-04-15 was released on: USA: 15 April 1962
What's My Line - 1950 1962-04-22 was released on: USA: 22 April 1962