Empiricism, Semantics, and Ontology - Important paper by Rudolf Carnap, first published in Revue Internationale de Philosophie 4 (1950): 20-40. www.ditext.com/carnap/carnap.html
Philosophical Foundations of Physics - Chapters 23 through 26 of this 1966 work. From the Marxists.org Philosophy Archive. www.marxists.org/reference/subject/philosophy/works/ge/carnap.htm
Rudolf Carnap - His life and work, from the Internet Encyclopedia of Philosophy. www.utm.edu/research/iep/c/carnap.htm
Rudolf Carnap - From Jena to L.A. - An international conference hosted by the University of Jena, Germany. Program and information. www.uni-jena.de/carnap
The Rudolf Carnap Page - Image gallery and links, maintained by the University of Maryland Philosophy Department. carnap.umd.edu/carnap/carnap.html