CitasSchrader, and L. Vivien St Martin. Colombie, Venezuela, Ecuador. Map. Paris: Librairie Hachette, 1930. Accessed December 26, 2022. https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~36567~1201122:Colombie,-VEN,-ECU-?sort=pub_list_no_initialsort%2Cpub_list_no_initialsort%2Cpub_date%2Cpub_date#.
Schrader, and L. Vivien St Martin. Colombie, Venezuela, Ecuador. Map. Paris: Librairie Hachette, 1930. Accessed December 26, 2022. https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~36567~1201122:Colombie,-VEN,-ECU-?sort=pub_list_no_initialsort%2Cpub_list_no_initialsort%2Cpub_date%2Cpub_date#.