1. Anatomy of Seed Plants;Esau,1977
2. Inventory of World Fibers and Involvement of FAO in Fiber Research;Kozlowski,2005
3. Identification of Papermaking Fibers;Ilvessalo-Pfaffli,1993
4. Vegetable Fibers;Kirby,1963
5. Other long vegetable fibers: Abaca, banana, sisal, henequen, flax, ramie, hemp, sunn and coir;Batra,2007