1 EXHIBIT 23 CONSENT OF INDEPENDENT ACCOUNTANTS We consent to the inclusion in this Form 8-K/A No.1 dated June 30, 1997 and the incorporation by reference into the Registrant's two previously filed Registration Statements on Form S-3 (File Nos. 333-21873 and 333-29879) of our report dated July 30, 1997, on our audit of the combined historical statement of revenues and certain expenses of the Punia Acquisition Properties. COOPERS & LYBRAND L.L.P. Chicago, Illinois September 3, 1997 20