1. 6739 4 N, Vietnam (AMS L8020), 1:25000 Raster The University of Texas at Austin Public content Scale: 1:25000; Other Descriptive Notes about Map Series:.
2. 6739 4 S, Vietnam (AMS L8020), 1:25000 Raster The University of Texas at Austin Public content Scale: 1:25000; Other Descriptive Notes about Map Series:.