April 1999 IIBEC Interface | Theme: Science & Physics of Roof Components April 30, 1999 Interface Issue
March 1999 IIBEC Interface | Theme: Environmental & Energy Roofing Issues March 30, 1999 Interface Issue
November 1998 IIBEC Interface | Theme: Professionalism and Roofing Consulting November 15, 1998 Interface Issue
September 1998 IIBEC Interface | Theme: Keeping Performance “Under Cover” at the Kennedy Center September 15, 1998 Interface Issue