Xochipala : the beginnings of Olmec art - Gay, Carlo T. E. (Princeton, N.J. : The University Press, 1972)
"The text is taken from a work in progress on preclassic ceramic figures from central and midwestern Mexico, by Carlo T. E. Gay and Frances Pratt."
Bibliography : p. 63
Keywords: Olmecs; Xochipala Valley, Mexico -- Antiquities