'The Town Area of the Letchworth Estate of First Garden City Ltd. Plan of Present Development Spring 1918.'
'Estate Office, Letchworth.'
'The Town is laid out from the Original Design by Barry Parker and Raymond Unwin Architects'
Anon. after Barry Parker and Raymond Unwin.
Scale: 1 inch to 7500 feet
Parker, Richard Barry, 1867-1943, architect and town planner