Gesammelte Werke: Metaphysik + Nikomachische Ethik + Organon ...
Aristoteles
Mathematica® Mechanical Systems
Robert Beretta
Introduction to Analysis of the Infinite
Leonhard Euler
Theories of Integration: The integrals of Riemann, Lebesgue, ...
Douglas S. Kurtz & Jaroslav Kurzweil & Charles W. Swartz
Proto-Indo-European Etymological Dictionary
Indo-European Language Revival Association
Figments of Reality: The Evolution of the Curious Mind
Ian Nicholas Stewart & Jack Cohen