Esa Itkonen has written:

'Grammatical theory and metascience' -- subject(s): Comparative and general Grammar, Hermeneutics, History, Language and languages, Linguistics, Methodology, Philosophy, Positivism

'Analogy as structure and process' -- subject(s): Analogy, Iconicity (Linguistics), Linguistics

'Universal history of linguistics' -- subject(s): History, Linguistics

Comparative linguistics is a branch of history linguistics that is concerned on comparing languages to establish historical relatedness. It implies a common origin.

A historical linguist.

This is known as Linguistics.

Giulio C. Lepschy has written:

'A survey of structural linguistics' -- subject(s): Structural linguistics

'Mutamenti di prospettiva nella linguistica' -- subject(s): Linguistics

'History of Linguistics'