Kameoka & Kuriyagawa paper

I'm trying to replicate the computational results of Kameoka &
Kuriyagawa's 1969 paper in JASA (pp1460-1469). Although I get the
right graph for pure dyads, the peak is not sharp enough for
3 partials. There is some ambiguity in the paper, and there
aren't any quantitative examples, so is anyone familiar enough
with it to help me?

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