CitasGrigg, John. Colombia and Guiana. Map. Philadelphia: John Grigg, 1830. Accessed October 2, 2022. https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~28113~1120245:Colombia,-Guiana-?sort=pub_list_no_initialsort%2Cpub_date%2Cpub_list_no%2Cseries_no.
Grigg, John. Colombia and Guiana. Map. Philadelphia: John Grigg, 1830. Accessed October 2, 2022. https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~28113~1120245:Colombia,-Guiana-?sort=pub_list_no_initialsort%2Cpub_date%2Cpub_list_no%2Cseries_no.