Delphos

Babel-17

Samuel R. Delany

An overview of computer-based natural language processing

William B. Gevarter

Word Expert Semantics

Bart C. Papegaaij

Spelin

Georg Bauer

Philosophical languages in the seventeenth century

Jaap Maat

A short history of the international language movement

Albert Léon Guérard

The Oxford advanced atlas

Bartholomew, J. G.

Dictionnaire du langage des nombres (cesges de damis)

Georges Boucher de Boucherville

Internationale Plansprachen

Detlev Blanke