A Primer of Malayalam Literature

by T K Krishna, Menon
Published 1990

Linguistic Survey of India, Vol-VII Indo-Aryan Family: Southern Group

Published 1905

First Principles of Verse

by Hillyer, Robert
Published 1950

Linguistic Survey of India, Vol-III: Tibeto-Burman Family, Part-1

Published 1909

Linguistic Survey of India, Vol-VIII, Part 1 Indo-Aryan Family: North Western Group

Published 1919

Linguistic Survey of India, Vol-I, Part 1 Introductory

Published 1927

Linguisitc Survey of India, Vol-IX: Indo-Aryan Family, Central Group, Part III

Published 1907

Language of Middle Malayalam

by Puthusseri, Ramachandran
Published 1973

Linguistic Survey of India Vol-IX Indo-Aryan Family: Central Group, Part I

Published 1916

Linguistic Survey of India, Vol-V: Indo-Aryan Family, Eastern Group, Part I

Published 1903

Linguistic Survey of India, Vol-XI: Gipsy Languages

Published 1922