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1973
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1984
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1988
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1989
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1990
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1991
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1993
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1990 Fools
RFC: Avian Carriers
April Fools on the Net
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1973
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1978
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1984
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1988
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1989
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1990
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1991
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1992
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1993
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1994
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1995
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1996
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1997
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1998
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1999