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2. http://florawww.eeb.uconn.edu/acc_num/198500370.html
3. A Dictionary of Plants Used by Man;Usher,1974
4. Ramie and Spanish Broom Fibres for Composite Materials: Agronomical Aspects, Morphology and Mechnical Properties;Angelini,2000
5. Buchanan, R., A Weavers Garden.