Output of program "wulff.c" (ANSI C) is a Wulff Net in HP-GL A4 format. (HP-GL A4 = Hewlett Packard Graphic Language, paper size A4, i.e. 297x210mm. Most pen-plotters understand HP-GL.) There are two options: usage: wulff dense wulff light Files "wulff_dense.eps" and "wulff_light.eps" contain the corresponding outputs converted to EPS (Encapsulated Postscript) format. Contact: rwgk@laplace.csb.yale.edu