AUTORES CITADOS Y COLABORADORES 
Aguilera, José O . — Instituto Geo- 
lógico. 
Alemany, J. — Dic. de la Lengua 
Castellana. 
Alonso Barba, Alvaro . — Arte de 
los Metales. 
Amor, A. M. 
Bacon and Hamor . — American I'e- 
troleum Industry. 
Bóteles, Oliver. 
Barroivmati, James . — Glossary of 
Scotch mining térros. 
Bustamante, Miguel. 
Cebadlos, Ramón — Departamento 
de Petróleo. 
Clapp, Frcderick G . — Hand Book 
of the Petroleum Industry. 
Ccntury, Dictionary and Cyclo- 
pedia. 
C. ¿i, p , — Coal Miner's Pocket 
Book. 
Chance, H. M. 
Dana, E. S.—A test book of mine- 
ralogy. 
Day, Eliot David.— A Hand Book 
of the Petroleum Industry. 
Day, David T . — Hand Book of the 
Petroleum Industry. 
Delbridge, T. G. 
Días Lozano, Enrique— Departa- 
mento de Petróleo. 
Diccionario Enciclopédico Hispa 
no- Americano. 
Dorantes, Salvador. — Departa- 
mento de Petróleo. 
Du Pont de Nemours, E. I. 
Duryee, S. — Nevada Prospect's 
Guido. 
Emmonds, W. II . — Geology of Pe- 
troleum. 
Escudero, Manuel. — Departamen- 
to de Petróleo. 
Esposa, J. — Enciclopedia Uni- 
versal. 
Farrcl, J. H. and Moses, A. J . — 
Manual of Geology. 
Fay, Albcrt H.—A Glossary of the 
Mining and Mineral Industry. 
Forgc La, L. — Geologist, U. S. 
Geological Survey. 
Gilí, J. D . — Hand book of the Pe- 
troleum Industry. 
Grane, Arturo E . — Departamento 
de Petróleo. 
Gressley, William S . — A Glossary 
of terms used in coal mining. 
González Cordero, Santiago. — De- 
partamento de Petróleo. 
González Zertuclie, O. — Departa- 
mento de Petróleo. 
Halse, E . — A Dictionary of Spa- 
nish Mining terms. 
Hang, E. 
Holrnes, A. 
Ingalls, Walter Rentan . — The me- 
tallurgy of zinc and cadmiun. 
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