https://collections.britishart.yale.edu/catalog/tms:62094|Central Bus and Trolleybus Routes|Benjamin Getzel Lewishttps://collections.britishart.yale.edu/catalog/tms:62091|Central Bus Routes North-East Area|Benjamin Getzel Lewishttps://collections.britishart.yale.edu/catalog/tms:62090|Central Bus Routes North-West Area|Benjamin Getzel Lewishttps://collections.britishart.yale.edu/catalog/tms:62092|Central Bus Routes South-East Area|Benjamin Getzel Lewishttps://collections.britishart.yale.edu/catalog/tms:62093|Central Bus Routes South-West Area|Benjamin Getzel Lewis