Alvarado, G. E., Brenes, J., & Brenes, J. (2011). The ocurrence of amber and sub-amber (copal) in Costa Rica: The case of San Cristóbal de Savegre.
Παραπομπή Chicago StyleAlvarado, Guillermo E., Jorge Brenes, και José Brenes. The Ocurrence of Amber and Sub-amber (copal) in Costa Rica: The Case of San Cristóbal De Savegre. 2011.
Παραπομπή MLAAlvarado, Guillermo E., Jorge Brenes, και José Brenes. The Ocurrence of Amber and Sub-amber (copal) in Costa Rica: The Case of San Cristóbal De Savegre. 2011.
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