Einstein, H.H., and Sousa, R.L. (2007). Warning systems for natural threats. Georisk, 1 (1), 3-20. doi:10.1080/17499510601127087
Einstein, H.H., and Sousa, R.L. (2007). Warning systems for natural threats. Georisk, 1 (1), 3-20. doi:10.1080/17499510601127087