This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Old Towns and New Needs Fig. . en Old Towns and New Needs book figure FIG Diagram showing similar areas each of acres developed with larger or smaller number of houses to the acre together with the cost of development The land in both cases is assumed to be worth per acre apart from the cost of roads The roads are taken as costing