CK-12 Geometry
Ck-12 Foundation
Logic-Based Knowledge Representation
Frank van Harmelen & Peter Jackson & Han Reichgelt
Key Terms in Philosophy of Art
Tiger C. Roholt
History: Fiction or Science?
Anatoly T. Fomenko
A History of Language Philosophies
Lia Formigari
A Functional Linguistic Perspective on Developing Language
Anne McCabe