BIBLIOGRAFIA

Callahan, E. Metallic Powder as an Aid to Stone Tool Photo graphy. American Antiquity 52: 768-772, 1987.

Cooper, C. L. Ammonium Chioride Sublimate Apparatus. Journal of Paleontology 9: 357-358, 1935.

Lutz, B. J. y D. L. Slaby. A Simplified Procedure for Photo graphing Obsidian. American Anriquity 37: 262-263, 1972.

Mayer-Oakes, W. J. El higa: a Paleoindian Site in the Sierra of Northern Ecuador. Transactions of the American Philosophical Society, volumen 76, parte 4, Philadelphia, 1986.

Rick, J. W. y T. D. White. Photography of Obsidian Artifacts: a Useful Altemative. Newsletter of Lithic Technology 4: 30, 1975.

Rovner, I. A Simpler Simplified Procedure for Photographing Obsidian. American Antiquily 39: 617, 1974.

Teichert, C. A Simple Device for Coating Fossils with Ammonium Chioride. Journal of Paleontology 22: 102-103, 1948.

Weide, D. L. y G. D. Webster. Ammonium Chioride Powder Used in the Photography of Artifacts. American Antiquity 32: 104-105, 1967.