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Blue, The History of a Color, Michel Pastoureau, Princeton University Press, 2001.
Color – A Natural History of the Palette, Victoria Finlay, Random House, New York, 2002.
The Woad Plant and Its Dye, Jamieson Hurry, Oxford University Press, 1930.
Brahmins and Pariahs: An Appeal by the Indigo Manufacturers of Bengal to the British Government, Parliament, and People, 1861.
Indigo Revolt in Bengal, Ministry of Culture, Government of India
Blue Jeans, Carolyn Purnell, Bloomsbury Academic, 2023
The Prelude or, Growth of a Poet’s Mind; An Autobiographical Poem, William Wordsworth, 1850.