1. Alpaca Registry, 2004. http://www.alpacaregistry.net/resources/statistics/census.htm (accessed October 11, 2004).
2. ASTM D 584–96, 2003. Standard test method for wool content of raw wool-laboratory scale. Annual Book of ASTM Standards, Sec. 7, vol. 07.01. American Society for Testing and Materials, West Conshohocken, PA, pp. 187–192.
3. ASTM E313–96, 1998. Standard practice for calculating yellowness and whiteness indices from instrumentally measured color coordinates. Annual Book of Standards. vol. 06.01. American Society for Testing and Materials, West Conshohocken, PA, pp. 721–725.
4. Australian/New Zealand TX 12 Working Group, 2000. Working Draft—Measurement of Fibre Curvature.
5. Australian Standard 3535, 1988. Wool-Method for the Measurement of Resistance to Compression. Standards Association of Australia, North Sydney, NSW.