Pillsbury, Joanne (1996). "The Thorny Oyster and the Origins of Empire: Implications of Recently Uncovered Spondylus Imagery from Chan Chan, Peru". Latin American Antiquity. 7 (4): 313–340. doi:10.2307/972262. ISSN1045-6635. JSTOR972262. S2CID164108466.
Glowacki, Mary (2005). "Food of the Gods or mere mortals? Hallucinogenic Spondylus and its interpretive implications for early Andean society". Antiquity. 79 (304): 257–268. doi:10.1017/s0003598x00114061. ISSN0003-598X. S2CID160047859.
Paulsen, Allison C. (1974). "The Thorny Oyster and the Voice of God: Spondylus and Strombus in Andean Prehistory". American Antiquity. 39 (4Part1): 597–607. doi:10.2307/278907. ISSN0002-7316. JSTOR278907. S2CID163248896.
emory.edu
carlos.emory.edu
"Earspools". Michael C. Carlos Museum. Archived from the original on 2018-04-13. Retrieved 2018-04-13.
Pillsbury, Joanne (1996). "The Thorny Oyster and the Origins of Empire: Implications of Recently Uncovered Spondylus Imagery from Chan Chan, Peru". Latin American Antiquity. 7 (4): 313–340. doi:10.2307/972262. ISSN1045-6635. JSTOR972262. S2CID164108466.
Paulsen, Allison C. (1974). "The Thorny Oyster and the Voice of God: Spondylus and Strombus in Andean Prehistory". American Antiquity. 39 (4Part1): 597–607. doi:10.2307/278907. ISSN0002-7316. JSTOR278907. S2CID163248896.
Pillsbury, Joanne (1996). "The Thorny Oyster and the Origins of Empire: Implications of Recently Uncovered Spondylus Imagery from Chan Chan, Peru". Latin American Antiquity. 7 (4): 313–340. doi:10.2307/972262. ISSN1045-6635. JSTOR972262. S2CID164108466.
Glowacki, Mary (2005). "Food of the Gods or mere mortals? Hallucinogenic Spondylus and its interpretive implications for early Andean society". Antiquity. 79 (304): 257–268. doi:10.1017/s0003598x00114061. ISSN0003-598X. S2CID160047859.
Paulsen, Allison C. (1974). "The Thorny Oyster and the Voice of God: Spondylus and Strombus in Andean Prehistory". American Antiquity. 39 (4Part1): 597–607. doi:10.2307/278907. ISSN0002-7316. JSTOR278907. S2CID163248896.
Pillsbury, Joanne (1996). "The Thorny Oyster and the Origins of Empire: Implications of Recently Uncovered Spondylus Imagery from Chan Chan, Peru". Latin American Antiquity. 7 (4): 313–340. doi:10.2307/972262. ISSN1045-6635. JSTOR972262. S2CID164108466.
Glowacki, Mary (2005). "Food of the Gods or mere mortals? Hallucinogenic Spondylus and its interpretive implications for early Andean society". Antiquity. 79 (304): 257–268. doi:10.1017/s0003598x00114061. ISSN0003-598X. S2CID160047859.
Ritual Sacrifice in Ancient Peru. Benson, Elizabeth P., Cook, Anita Gwynn. (1st ed.). Austin: University of Texas Press. 2001. ISBN0292708939. OCLC55873621.{{cite book}}: CS1 maint: others (link)
Paulsen, Allison C. (1974). "The Thorny Oyster and the Voice of God: Spondylus and Strombus in Andean Prehistory". American Antiquity. 39 (4Part1): 597–607. doi:10.2307/278907. ISSN0002-7316. JSTOR278907. S2CID163248896.