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^ Ludwig W, Euzéby J, Whitman WB (2010). "Family I. Rhodothermaceae fam. nov.". In Krieg NR, Staley JT, Brown DR, Hedlund BP, Paster BJ, Ward NL, Ludwig W, Whitman WB (eds.). Bergey's Manual of Systematic Bacteriology. Vol. 4 (2nd ed.). New York: Springer. p. 457.