File list (Check if you may need any files):
IIRFilterDesign
...............\classes
...............\.......\IIRFilterDesign.htm
...............\GraphPlot.class
...............\GraphPlot.java
...............\IIRFilter.class
...............\IIRFilter.java
...............\IIRFilterDesign.class
...............\IIRFilterDesign.java
...............\IIRFilterDesign.jcp
...............\IIRFilterDesign.jcw
...............\PoleZeroPlot.class
...............\PoleZeroPlot.java
...............\src_iirfilterdesign.txt