EX-99.1 3 sdc327a.txt AGREEMENT TO FILE JOINTLY ---------------------------------------- CUSIP No. 743737108 ---------------------------------------- EXHIBIT 1 TO SCHEDULE 13G Keeley Asset Management Corp., Kamco Performance Limited Partnership and Kamco Limited Partnership No. 1 agree that, unless differentiated, this Schedule 13G is filed on behalf of each of the parties. Dated this 31st day of January, 2003. KEELEY ASSET MANAGEMENT CORP. /s/ John L. Keeley, Jr. ---------------------------------------------- John L. Keeley, Jr., President KAMCO PERFORMANCE LIMITED PARTNERSHIP /s/ John L. Keeley, Jr. ---------------------------------------------- John L. Keeley, Jr., General Partner KAMCO LIMITED PARTNERSHIP NO. 1 /s/ John L. Keeley, Jr. ---------------------------------------------- John L. Keeley, Jr., General Partner Page 7 of 7 Pages