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He was working for his brother Ludvig when he bought an interest in an oil refinery in Baku, Azerbaijan in 1876. He and his brother started Branobel, which was an important early oil company that controlled a large amount of Russian output.
- Yergin, Daniel (1991). The Prize: The Epic Quest for Oil, Money & Power. Free Press. ISBN 0-671-79932-0.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
- Tolf, Robert W. (1976). The Russian Rockefellers: The Saga of the Nobel Family and the Russian Oil Industry. Hoover Press. ISBN 0-8179-6581-5.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
- Media related to Robert Nobel at Wikimedia Commons
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