Hedström I, Denzel A, Owens G. Orchid bees as bio-indicators for organic coffee farms in Costa Rica: Does farm size affect their abundance?. Rev. Biol. Trop. [Internet]. 2006Sep.1 [cited 2024Dec.19];54(3):965–969. Available from: https://revistas.ucr.ac.cr/index.php/rbt/article/view/14075