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Trinidad. Map showing the Oilfields in the Island of Trinidad, B.W.I. (c.1930s). Unpublished dye-line map at 1:126,720 scale. self published.
Ecuador (1969). Mapa Geologico de la Republica del Ecuador. Servicio Nacional de Geologia y Mineria. Two joined colour lithographed sheets. Servicio Nacional de Geologia.
Trinidad (1961). Geological map of Trinidad. Petroleum Association of Trinidad. 1:100,000 scale, 92 x 117cm folding to 92 x 58.5 cm. Colour lithograph
Mexico. Muir, John M. (1936). Geology of the Tampico Region Mexico. Tulsa: American Association of Petroleum Geologists. xix + 280pp + 5 folded maps. American Association of Petroleum Geologists.