Ekholm, G. F., & Bernal, I. (1971). Archaelogy of northern mesoamerica. University of Texas Press.
Chicago-čujuhus (17. p.)Ekholm, Gordon F., juo Ignacio Bernal. Archaelogy of Northern Mesoamerica. Austin: University of Texas Press, 1971.
MLA-čujuhus (9. p.)Ekholm, Gordon F., juo Ignacio Bernal. Archaelogy of Northern Mesoamerica. University of Texas Press, 1971.
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