Reference for Orvieto, Umbria, Italy

The page numbers on the linking page (e.g., [73] ) reference pages in The Evolution of the Design of Orvieto Cathedral, ca. 1290-1310
Author(s): David M. Gillerman
Source: The Journal of the Society of Architectural Historians, Vol. 53, No. 3, (September, 1994), pp.  300-321
Published by: Society of Architectural Historians
Stable URL: http://www.jstor.org/stable/990939