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THE FOUR INSEPARABLE FACTORS OF EVOLUTION. THEORY OF THEIR DISTINCT AND COMBINED ACTION IN THE TRANSFORMATION OF THE TITANOTHERES, AN EXTINCT FAMILY OF HOOFED ANIMALS IN THE ORDER PERISSODACTYLA

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Science  24 Jan 1908:
Vol. 27, Issue 682, pp. 148-150
DOI: 10.1126/science.27.682.148
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