Grigoryev V. M. G., . (1974). Prakruthiyute balangal. : State Institute of Languages.
Grigoryev V Myakisher G, . 1974. Prakruthiyute balangal. : State Institute of Languages.
Grigoryev V Myakisher G, . Prakruthiyute balangal. : State Institute of Languages. 1974.