Published in Journal of Ethnopharmacology in 1986, via ScienceDirect:
A multidisciplinary approach to ritual enema scenes on ancient Maya pottery
Apparently only the abstract is freely available. I must admit I’m considering buying the paper. Maybe after reading it I can use it as a Christmas gift for my Arts Editor. Hmm.
And I did find this on a brief search, although the source appears to have disappeared.
