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Dyfyniad Arddull ChicagoAmador Astúa, Jorge Alberto, Álvaro Burgos Rivas, Francisco Javier Soley Alfaro, Juan Gabriel Serpas Claros, y A. Vargas. Remote Sensing At the Centre for Geophysical Research, University of Costa Rica. 1993.
Dyfyniad MLAAmador Astúa, Jorge Alberto, et al. Remote Sensing At the Centre for Geophysical Research, University of Costa Rica. 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.