@book{ Solr-British School at Rome.BSR44089, title = {Walls of Rome, Porta S. Giovanni [sic]}, editor = {Mackey, Peter Paul, 1851-1935}, year = {1890}, pages = {1}, note = {Title from manuscript catalogue compiled by Mackey.}, url = {http://www.bsrdigitalcollections.it/islandora/object/MACKEY:1544} }