Jeevan:
Namboothiri, A. N.
Jeevan: udbhavaum Vikasavum / by A. N. Namboothiri and N. V. Krishna Warrier - Kottayam : D C Books, 1983. - Naamjeevikkunna lokam N0.3 .
In Malayalam
Biology Encyclopaedia
Jeevan: udbhavaum Vikasavum / by A. N. Namboothiri and N. V. Krishna Warrier - Kottayam : D C Books, 1983. - Naamjeevikkunna lokam N0.3 .
In Malayalam
Biology Encyclopaedia