ISBN 0-521-77111-0[http://books.google.co.in/books?id=54fV7Lwu3fMC&pg=PA492&dq=Proto+south+dravidian&hl=en&sa=X&ei=XFnFU-LaKdacugTosIGACQ&ved=0CBoQ6AEwAA#v=onepage&q=Proto%20south%20dravidian&f=false]*Subrahmanyam, P.S., "Dravidian Comparative Phonology", Annamalai University, 1983.
# Subrahmanyam, P.S., Dravidian Comparative Phonology, Annamalai University, 1983.