1. “Man's Role in Changing the Face of the Earth,”;Stewart,1956
2. Herodotus, “History. Trans. G. Rawlinson,”,1936
3. Herodotus, reported in Refs. 4 and 5.
4. “Untersuchungen über die Grundlagen des Feuerschutzes von Holz,”;Schlegel,1934
5. “Theories of the Combustion of Wood and its Control,” Rept. No. 2136;Browne,1958