94. ⸺. Orinoco-Essequibo Regions.... map, 2, Senate Doc. U.S. (Boundary Commission), 1897.
See also Nos. [79], [119], [120], [366], [367].
III. GEOLOGICAL.
95. Ahrensburg, H. Erdbeben in Carácas. Mitt. Géogr. Ges. Jena, bd. xix, pp. 56-8 [1901].
96. Attwood, G. A Contribution to South American Geology. Quart. Journ. Geol. Soc., vol. xxxv, pp. 582-590, map [1879].
97. Bendrat, T. A. Geologic and Petrographic Notes on the Regions about Caicara, Venezuela. Amer. Journ. Sci., ser. 4, vol. xxxi, pp. 443-52 [1911].
98. Bonssingault,—. Les Sources Thermales de la Chaîne du littoral du Vénézuéla, Compt. Rend., t. xci, pp. 836-41 [1880].
99. Buch, L. v. Von Aptychus, und über die Anden von Venezuela. Zeitschr. deutsch. geol. Ges., bd. ii, pp. 339-44, pl. x [1850].
100. Cortese, E. Escursioni geologiche al Venezuela. Boll. Soc. Geol. Ital., vol. xx, pp. 447-69 [1901].