Attributes / relations provided by
♦ 1Wood Janka Hardness Scale/Chart J W Morlan's Unique Wood Gifts
♦ 2del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.).
Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ 3Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014).
Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
♦ 4Dietary Variability of Mountain Gorillas in Bwindi Impenetrable National Park, Uganda; Jessica Ganas, Martha M. Robbins, John Boscoe Nkurunungi,
Beth A. Kaplin, and Alastair McNeilage; International Journal of Primatology, Vol. 25, No. 5, October 2004, p. 1043-1072