Xayheungsy, S., Thanh, N. C., Nam, L. D., Giang, V. H. and Khiem, L. H. (2018) “MEASUREMENT OF NATURAL RADIOACTIVITY IN SOME SAND AND BRICK IN VIETIANE PROVINCE, LAO PDR”, IJRDO-Journal of Applied Science, 4(11), pp. 11-19. doi: 10.53555/as.v4i11.2533.