Some roads do lead to Incallajta :
Coben, Lawrence S.
Some roads do lead to Incallajta : the inca double road from Vacas. - California-XXU : Institute of Andean Studies, 2010. - p. 53-63: il. - Irregular - vol. 30, no. 1(Jun. 2010) - Ñawpa pacha. Journal of Andean Archaeology ; vol. 30, no. 1 . - Estados Unidos . Institute of Andean Studies,. .
Inglés.
Some roads do lead to Incallajta : the inca double road from Vacas. - California-XXU : Institute of Andean Studies, 2010. - p. 53-63: il. - Irregular - vol. 30, no. 1(Jun. 2010) - Ñawpa pacha. Journal of Andean Archaeology ; vol. 30, no. 1 . - Estados Unidos . Institute of Andean Studies,. .
Inglés.