Dallapiccola, Anna L.: . ISBN 0-500-51088-1 Walker, Benjamin: , (to bind), Allen & Unwin, London, 1968; Praeger, New York, 1968; Munshiram Manohar Lal, New Delhi, 1983; Harper Collins, New Delhi, 1985; Rupa, New Delhi, 2005, ISBN 81-291-0670-1.