Proceedings of the second Pan American scientific congress : geologia general y económica de Colombia / by Ospina, Tulio

Subjects:

El petroleo / by Orfila Reynal, Arnaldo

Subjects: “…Geología económica y aplicada…”

Fuell cells power for tomorrow / by Halacy, D. S. (jr.)

Subjects: “…Geología económica y aplicada…”

Proceedings of the second Pan American scientific congress : mineralogía, metalurgia y geología económica / by Fleury, Luis

Subjects:

Evaluación y factibilidad de proyectos mineros / by Millán U., Augusto

Subjects:

La chaine charbonnière /

Subjects:

Las especies minerales de la República Argentina : Anexo 1981-1994 / by Brodtkorb, Milka K.de

Subjects:

Proceedings of the second Pan American scientific congress : food and efficiency / by Wiley, Harvey W.

Subjects:

Proceedings of the second Pan American scientific congress : methods and cost of obtaining crude petroleum in California / by Cox, Thomas

Subjects:

Proceedings of the second Pan American scientific congress : contribución al análisis toxicológico del mercurio / by Renson, Carlos

Subjects:

Proceedings of the second Pan American scientific congress : Bolivian tin and its relation to the United States / by Bancroft, Howland

Subjects:

Proceedings of the second Pan American scientific congress : the occurrence and preparation of radium and associated metals / by Parsons, Charles L.

Subjects:

Proceedings of the second Pan American scientific congress : improvement in mining and metallurgy an aid to conservation / by Ricketts, L. D.

Subjects:

Proceedings of the second Pan American scientific congress : the storage and handling of explosives in mines / by Munroe, Charles E.

Subjects:

Yacimientos minerales de rendimiento económico / by Bateman, Alan M.

Subjects:

Yacimientos minerales / by Park, Charles Frederick ‎ 1903-

Subjects:

Geología de yacimientos minerales / by Smirnov, Vladimir I.

Subjects:

Las asfaltitas de la provincia de Mendoza / by Fester, Gustav Anselm‏

Subjects:

Gites minéraux / by Meunier, Stanislas

Subjects:

Minéraux utiles et l'explotation des mines / by Knab, Louis

Subjects: “…GEOLOGIA ECONOMICA…”