旧石器时代 - 维基百科,自由的百科全书
Palaeolithic - Simple English Wikipedia, the free encyclopedia
Upper Paleolithic - Wikipedia
Lower Paleolithic - Wikipedia
Upper Palaeolithic - Simple English Wikipedia, the free encyclopedia
Ancient History/Human Evolution/Paleolithic Age - Wikibooks
Paleolithic Period | Definition, Dates, & Facts | Britannica
Paleolithic Europe - Wikipedia
Paleolithic - World History Encyclopedia