Sims, Margaret E.; Baker, Barry W.; Hoesch, Robert M. Tusk or Bone? An Example of Ivory Substitute in the Wildlife Trade. Ethnobiology Letters. 2011, 2: 40–45. JSTOR 26419931. doi:10.14237/ebl.2.2011.27.
Sims, Margaret E.; Baker, Barry W.; Hoesch, Robert M. Tusk or Bone? An Example of Ivory Substitute in the Wildlife Trade. Ethnobiology Letters. 2011, 2: 40–45. JSTOR 26419931. doi:10.14237/ebl.2.2011.27.