Great Books popular of the Western World 1952 Vol 16-20 Encyclopedia Britannica

Great Books of the Western World 1952 

Volume 16-20 Encyclopedia Britannica.  This set is in good shape, especially considering the age. 

Vol 16 - Ptolemy - Copernicus - Kepler
Vol 17 - Plotinus The Six Enneads
Vol 18 - Augustine - The Confessions The City Of God On Christian Doctrine
Vol 19 - Thomas Aquinas Vol I - The Summa Theologica Of Saint Thomas Aquinas
Vol 20 - Thomas Aquinas Vol popular II - The Summa Theologica Of Saint Thomas Aquinas