List some import aspects about location Ljubija in given text
In the 19th century, Ljubija developed into one of the most important locations for the area's economy due to its iron ore deposits. After World War II Ljubija became one of the largest iron mines in the world which employed more than 5,000 people at any one time. Until 1963 it was governed as a separate municipality, before it was merged with Prijedor.
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1. Because of its iron ore resources, Ljubija became one of the most significant destinations for the region's economy in the 19th century.
2. Ljubija grew to be one of the world's largest iron mines after World War II, employing more than 5,000 people at any given moment.
3. Prior to being amalgamated with Prijedor, it was governed as an independent municipality until 1963.
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