The Lubartworld project requires searching through a broad range of sources in multiple collections. Our simultaneoulsy microhistorical and transnational approach also necessitates the juxtaposition of collection procedures on different scales and territories. The diverse sources naturally include archives, but iconography as well (photographs, maps, audiovisual recordings, etc.). They also rely on databases already created by various institutions. These pages present the various collections used, and serve as a guide for individuals seeking information on their ancestors, within the teeming landscape of sources on migration and persecution.