The concept of freedom - Sprigg, Christopher St. John, 1907-1937 (London : Lawrence & Wishart, 1977)
Mengandungi judul-judul yang diterbitkan di dalam'Studies in dying culture, 1938, Further studies in dying culture, 1949 dan The crisis in physics, 1939'oleh pengarang yang sama
Keywords: Civilization, Modern -- 20th century; Middle classes