95
ADDENDUM
Since this monograph was written and printer's copy prepared,
publications have appeared which contain information having a bearing on
the subject.  These are cited below, with an indication of their content.
Heizer, Robert F.
1967    Analysis of Two Low Relief Sculptures from La Venta.   Contri-
butions of the University of California Archaeological Research
Facility, No. 3, 25-55, Berkeley.
(Some observations on Olmec sculptural techniques and produc-
tions.)
Coe, Michael D.
1967    La segunda temporada en San Lorenzo Tenochtitlan, Veracruz.
Instituto Nacional de Antropologifa e Historia, Boletin 28,
1-10, Mexico, D.F.
(Excellent photographs of new sculptures discovered in 1967 at
San Lorenzo site; first frontal photograph of SL 6 colossal
head in upright position; contour map of San Lorenzo site
showing structures and locations of 43 monuments known to date.
Plate 36 and Figure 29 of the present paper are taken from
this article.)
Acosta, J. R.
1967    Traslado de la cabeza de Tres Zapotes.   Instituto Nacional de
Antropologla e Historia, Boletin 28, 47-48, Mexico, D.F.
(Account of moving colossal head TZ 1 in June, 1967, from its
original find spot to the nearby village of Tres Zapotes.
Statement made that "su peso es aproximadente de ocho toneladas.")
Heizer, Robert F. and P. Drucker
n.d.    The fluted pyramid (Complex C) of La Venta.   (To be published.)
(Details on size and form of the La Venta pyramid; corrects
errors published in Drucker, Heizer and Squier 1959.)