Sir Ralph Lilley Turner MC created what type of book based on Proto-Indo-Aryan language also known as Proto-Indic language?
Ralph Lilley Turner:  He is notable for composing an Indo-Aryan comparative dictionary. Proto-Indo-Aryan language: Proto-Indo-Aryan (sometimes Proto-Indic) is the reconstructed proto-language of the Indo-Aryan languages.
Indo-Aryan comparative dictionary