Exposure to natural sources of radiation in Spain 0 By admin on enero 20, 1993 1993, Artículos L.S. Quindós, P.L: Fernández y J. Soto. Nuclear Tracks Radiation Measurements, vol 21, nº 2, pp. 295-298 (1993). [Documento pdf] Share. Twitter Facebook Google+ Pinterest LinkedIn Tumblr Email