Gilbert, V. J. (1976). A transatlantic origin for the zodiac: Paper presented for distribution at the XLII International Congress of Americanists, centenary congress, Paris, 2-9 September 1976 : incorporating material presented at previous congresses. Assessoria de Promocao e Cultura, Editora LTDA.

Gilbert, Vera Jane. A Transatlantic Origin for the Zodiac: Paper Presented for Distribution at the XLII International Congress of Americanists, Centenary Congress, Paris, 2-9 September 1976 : Incorporating Material Presented at Previous Congresses. Sao Paulo, Brasil: Assessoria de Promocao e Cultura, Editora LTDA, 1976.

Gilbert, Vera Jane. A Transatlantic Origin for the Zodiac: Paper Presented for Distribution at the XLII International Congress of Americanists, Centenary Congress, Paris, 2-9 September 1976 : Incorporating Material Presented at Previous Congresses. Assessoria de Promocao e Cultura, Editora LTDA, 1976.