http://www.lib.uchicago.edu/e/reg/using/floorplans/images/1stFloorDir.pdf (sorry, I can only link to a PDF)

The font in question is the capital, sans-serif one used for the Regenstein Library title and the listings of other rooms on the right. Is this the same font as the main print?

In PDF you can read out the implemented fonts with Adobe Acrobat.

Yuo are looking for Scala Sans Caps.