ポール・マリー・ギスラン・オトレの起業した事業は何？
In 1906, with his father Édouard near death and his businesses falling apart, Paul and his brother and five step-siblings formed a company, ("Otlet Brothers") to try to manage these businesses, which included mines and railways. Paul, though he was consumed with his bibliographic work, became president of the company. In 1907, Édouard died, and the family struggled to maintain all parts of the business. In April 1908, Paul Otlet and his wife began divorce proceedings. Otlet remarried in 1912, to Cato Van Nederhesselt.
"Otlet Brothers"