R. Leela Devi
Influence of English on Malayalam novels
Malayāḷa bhāṣāśāstr̲aṃ
The Vidur-gita
FOUR LANGUAGES DICTIONARY (ENGLISH-MALAYALAM-HINDI-TAMIL)
History of Kerala
History of Malayalam literature
Prabhāt Iṅglīṣ-Malayāḷaṃ nighaṇṭu
Vidyarthi mithram four Languages Dictionary
Vidyarthi Mitram four languages dictionary, English-Malayalam-Hindi-Tamil