Fitriansyah, Rizki Akbar and Setiawan, Agus and Rustiati, Elly L. and Laji, Utoyo and Sibarani, Marsya Spatial distribution and temporal patterns of food tree availability of hornbills (Bucerotidae) at Way Canguk Research Station, Bukit Barisan Selatan National Park, Indonesia. Departement of Biology, FMNS, Universitas Sebelas Maret.