Walden, Paul, 1863- Drei Jahrtausende Chemie. - Berlin, W. Limpert [1944] - xii, 305 p. illus. (diagrs.) ports. 22 cm. "Literaturhinweise": p. 289-305. LCCN: af 47001634 Subjects--Topical Terms: Chemistry--History. LC Class. No.: QD11 / .W33