These are the succeeding volumes of a series of books on thermodynamic properties of engineering materials prepared under the auspices of the State Service of Standard Reference data of the Soviet Union. Each volume is set up in the same way: Part I deals with a study of all necessary aspects of experimental data interpretation and analysis; Part II then presents the fundamental constants, symbols with units, and data tables. Researchers and engineers in the fields of process design, equipment development, custody transfer and safety will find these book valuable and reliable reference sources for their respective tasks.Table of Contents: Contents: Thermophysical Properties of Freon-20.- Thermophysical Properties of Freon-21.- Thermophysical Properties of Freon-22.- Thermophysical Properties of Freon-23.- References. Thermophysical Properties of Freons