SmithE. Baldwin, Architectural Symbolism of Imperial Rome and the Middle Ages. (Princeton Monographs in Art and Archaeology, XXX.) Princeton, New Jersey: Princeton University Press, 1956. Pp. x, 219; 175 illustrations on 15 plate pages, + 4 pages of errata (posthumous). $7.50
Conant, Kenneth John
Speculum, 1958, Vol.33 (1), p.137-139 [Periódico revisado por pares]New York, USA: Cambridge University Press
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