Keywords: Multiple nuclei model.svg SVG version of http //commons wikimedia org/wiki/File Ulman2 png <br> Chauncy Harris and Edward Ullman's Multiple Nuclei model of urban structure Ulman2 png 2009-10-28 17 06 UTC Ulman2 png SuzanneKn wikipedia en derivative work 11gardir <span class signature-talk >talk</span> Recreated old image as an SVG 11gardir Ulman2 png PD-user-w original upload log This image is a derivative work of the following images File Ulman2 png licensed with PD-user-w 2008-04-23T16 23 41Z File Upload Bot Magnus Manske 1334x959 30138 Bytes <nowiki> en wikipedia S Knights my diagram Transferred from http //en wikipedia org en wikipedia 2008-01-15 original upload date Original uploader was </nowiki> Uploaded with derivativeFX Urban studies and planning |