1. George Watt (ed.), A Dictionary of the Economic Products of India (London, 1890), Vol. 4, pp. 390–91 has a lengthy discussion on nila’s complicated etymology.
2. Jan Wisseman Christie, ‘Weaving and dyeing in early Java and Bali’, paper presented at the 7th International Conference of the European Association of South-east Asian Archaeology, Berlin, September 1998 (to be published in Southeast Asian Archaeology 1998, ed. W. Laslo); John Crawfurd, A Descriptive Dictionary of the Indian Islands and Adjacent Countries (London, 1856), pp. 156–57.
3. Roderick Whitfield and Anne Farrer, Caves of the Thousand Buddhas (London: British Museum Press, 1990) , p. 108.