Robert I, Latin Emperor (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Robert I, Latin Emperor" in English language version.

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Nicol 1993, p. 12-13. Nicol, Donald M. (1993) [1972]. The Last Centuries of Byzantium, 1261-1453 (2. ed.). Cambridge University Press. ISBN 9780521439916.
Nicol 1993, p. 13. Nicol, Donald M. (1993) [1972]. The Last Centuries of Byzantium, 1261-1453 (2. ed.). Cambridge University Press. ISBN 9780521439916.