In the August 1969 issue of Word Ways, Ross Eckler introduced the idea of mutating "Mary Had a Little Lamb" by writing five versions of the poem in lipogrammatic form, in which only one of the five vowels was not used throughout each text. Seventeen years later, in the August 1986 issue, Paul Hellweg presented five more versions, this time in univocalic form, in which only one of the five vowels was used throughout each text. Although this isn't the August 2003 issue, I'm continuing the tradition by adding five more poems to the flock.
"Mary Had a Little Lampoon,"
Word Ways: Vol. 21
, Article 6.
Available at: http://digitalcommons.butler.edu/wordways/vol21/iss4/6