Autoradiography

 Visualisation of the distribution of radioactive substance tagged within a cell. Photographic image created due to decay of radioactive material producing an emission that can be captured. 

HARTL, D. L. AND RUVOLO, M.
Genetics: Analysis of Genes and Genomes
In-text: (Hartl and Ruvolo, 2012)
Bibliography: Hartl, D. and Ruvolo, M. (2012). Genetics: Analysis of Genes and Genomes. 8th ed. London: Jones & Bartlett, p.749.