Sadler, John Edward. J. A. Comenius and the concept of universal education. / by John Edward Sadler. - London : Allen & Unwin, 1966. - 318 p. : front., 5 plates (incl. facsims.); 23 cm. Includes bibliography and index. Subjects--Personal Names: Comenius, Johann Amos, 1592-1670. Subjects--Topical Terms: Education--Philosophy. Dewey Class. No.: 370.1 / SAJ 1966