Sobotkova, A., & Valchev, T. Field Observations of Burial Mounds from the Soviet Military Topographic Maps for the Yambol Province, SE Bulgaria. Ubiquity Press.
Chicago Style (17th ed.) CitationSobotkova, Adela, and Todor Valchev. Field Observations of Burial Mounds from the Soviet Military Topographic Maps for the Yambol Province, SE Bulgaria. Ubiquity Press.
MLA (9th ed.) CitationSobotkova, Adela, and Todor Valchev. Field Observations of Burial Mounds from the Soviet Military Topographic Maps for the Yambol Province, SE Bulgaria. Ubiquity Press.
Warning: These citations may not always be 100% accurate.