Horn, S. P., & Rodgers, J. C. (1996). The northern limit of Alnus (Fagales) in Costa Rica: Modern pollen evidence of a possible range extension.
Παραπομπή Chicago StyleHorn, Sally P., και John C. Rodgers. The Northern Limit of Alnus (Fagales) in Costa Rica: Modern Pollen Evidence of a Possible Range Extension. 1996.
Παραπομπή MLAHorn, Sally P., και John C. Rodgers. The Northern Limit of Alnus (Fagales) in Costa Rica: Modern Pollen Evidence of a Possible Range Extension. 1996.
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