"From the Polycene formation of Chou Kou Tien, Hopei Province", China [details]
"From the Hipparion red clay of Shueh Hua Shan, Chingshing, Hopei Province", China [details]
"From the Hipparion red clay of Shueh Hua Shan, Chingshing, Hopei Province", China [details]
"From the Polycene formation of Chou Kou Tien, Hopei Province", China [details]
"From the Polycene formation of Chou Kou Tien, Hopei Province", China [details]
"From the Polycene formation of Chou Kou Tien, Hopei (Chihli) Province", China [details]
"From the supposed Hipparion red clay of Shueh Hua Shan, Chingshing, Hopei Province", China [details]
"From the supposed Hipparion red clay of Shueh Hua Shan in Chingshing, Hopei Province", China [details]
"From the Polycene formation of Chou Kou Tien, Hopei Province", China [details]
"From the supposed Hipparion red clay of Shueh Hua Shan in Chingshing, Hopei Province", China [details]
"From the red clay of Chou Kou Tien, Polycene formation. Hopei Province", China [details]
"From the red clay of the Polycene formation, Chou Kou Tien. Hopei Province", China [details]