ഈ ഗ്രന്ഥം എഴുതുന്നതിനു് ഉപയോഗപ്പെടുത്തിയിട്ടുള്ള പുസ്തകങ്ങൾ 1. An Introduction to the History of Language - T. G. Tucker 2. Science of Language - F. Max Muller 3. The Life and Growth of Language - W. D. Whitney 4. Human Race - L.Geiger 5. History of the Original Inhabitants in India - G. Opper 6. Indian Philology - J. Beams 7. Telugu Philology - Seshagiri 8. History of Deccan - Grebble 9. Tamil Studies - Sreenivasa Iyer 10. Historical Sketches of Southern India - P. M. Wilkes 11. Land of the Tamulians - Gribble 12. Tumils 1800 Years Ago - Gribble 13. Floklore in Southern India - S. M. Natesa Sastri 14. Asiatic Journal, Selection from the Researches - London Reprint 15. Encyclopaedia Britannica 16. A Comparative Grammar of Dravidian Languages - Bishop Coldwell 17. A Comparative Grammar of the Modern Arian Languages of India - J. Beams 18. Ancient and Modern Sanskrit Grammar - Whitney 19. Ashtadhyayi - Panini 20. Kerala Panineeyam (Revised edition) - A. R. Raja Raja Varma 21. History of Malayalam Language - P. Govinda Pillai 22. A Short History of Malayalam Literature - P. Sankaran Nambiar 23. The History of Cochin State - K. Padmanabha Menon 24. Keralothpathy
