“Mapa Geológico de la República de Guatemala, 1970” 1:500,000.
Compliado por Samuel Bonis (Instituto Geografico Nacional), Otto H. Bohnenberger (ICAITI) y Gabriel Dengo (ICAITI)
The first geological map of Guatemala, produced through a collaboration between the National Geography Institute and the Central American Industrial and Techical Institute. This map was important for ongoing exploration and exploitation interests of mining and petroleum companies.
