3. With bell tower Heavilon Hall 20th Century http://cobweb.ecn.purdue.edu/~sweeta/
4. Of Heavilon Hall and the bell tower The Separation http://earchives.lib.purdue.edu/cdm4/item_viewer.php?CISOROOT=/pbuildings&CISOPTR=1449&CISOBOX=1&REC=5 http://earchives.lib.purdue.edu/cdm4/item_viewer.php?CISOROOT=/pbuildings&CISOPTR=1453&CISOBOX=1&REC=9
6. Construction of Bell Tower 1995 http://www.tarp-laff.com/images/ornamental/Purdue%20belltower%20b.jpg
7. Bell Tower Present Day http://www.mensetmanus.net/purdue/bigimages/tower-plaque.jpg http://earchives.lib.purdue.edu/cdm4/item_viewer.php?CISOROOT=/pbuildings&CISOPTR=2638&CISOBOX=1&REC=5