[1]
L. Utoyo, W. Marthy, R. A. Noske, and F. Surahmat, “Nesting cycle and nest tree characteristics of the Helmeted Hornbill <em>Rhinoplax vigil</em>, compared to the Wreathed Hornbill <em>Rhyticeros undulatus</em&gt;, in Sumatran lowland rainforest”, KUKILA, vol. 20, pp. 12-22, Jun. 2017.