Answer
Leopold von Ranke, a renowned German historian, regarded Vuk Karadžić as a primary source for his comprehensive study of "The Serbian Revolution." Karadžić's contributions were highly valued for their accuracy, authenticity, and firsthand knowledge of the historical events that shaped Serbia's path towards independence. His meticulous documentation and unbiased accounts provided a solid foundation for Ranke's scholarly work on this pivotal period in Serbian history.