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Williams, Stanley N.; Self, Stephen (1983). "The October 1902 plinian eruption of Santa Maria volcano, Guatemala". Journal of Volcanology and Geothermal Research. 16 (1–2): 33–56. Bibcode:1983JVGR...16...33W. doi:10.1016/0377-0273(83)90083-5.
Marcel Aubert; J. Adolf Schmoll gen. Eisenwerth; Hans Hellmut Hofstätter (1964). High Gothic Art. Methuen. p. 68. ISBN9789070053376. Archived from the original on 2020-08-19. Retrieved 2020-01-17.
Ira Remsen; Charles August Rouiller (1907). American Chemical Journal. American Chemical Society. p. 415. Archived from the original on 2020-08-07. Retrieved 2020-01-17.