China Historical GIS, Harvard University and Fudan University CC BY-NC 4.0 https://maps.cga.harvard.edu/tgaz/placename/hvd_96522 蒙山郡 蒙山郡 Mengshan Jun 郡 郡 jun commandery 553 4 582 4 POINT point N 29.98556 E 102.98437 FROM_AC 西魏 Xiwei 北周 Bei Zhou 隋 Sui CHGIS