I'm reading a book called Tudor Church Music. It mentions a Kyrie setting written by Christopher Tye that is based on the Missa Orbis Factor. The author states that there is an alternation between the chant melody and a polyphonic response. I've found MP3 files of the piece, but I can't find the score. I look on ChoralWiki, and I searched on Google.
Does anyone have any idea where I can find this score?
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