Sonia Cheriyan Indian Rainbow (ഇന്ത്യൻ റെയിൻബോ) / by Dr Sonia Cheriyan - 5th ed. - Kozhikode; Mathrubhumi Books, 2023. - 232 p. ISBN: 9789353626765 Dewey Class. No.: 894.912 / SON/I