Columbia subject headings:
China, Northwest--Antiquities.
Prehistoric peoples--China, Northwest.
Stone implements--China, Northwest.
Harvard subject headings:
China, Northwest--Antiquities.
Paleolithic period--China, Northwest.
Paleontology--China, Northwest.
Paleontology--Pleistocene
Prehistoric peoples--China, Northwest.
Stone implements--China, Northwest.
Princeton subject headings:
China, Northwest--Antiquities.
Prehistoric peoples--China, Northwest.
Stone implements--China, Northwest.