�����Broekhuizen, R. J. (1995). Graphic Communications. Fourth Edition. Glencoe Division of Macmillan/McGraw-Hill School Publishing Company. Peoria, IL. �����Prust, Z. A. (1994). Graphic Communications, The Printed Image. Goodheart-Willcox Company, Inc., USA. �����Walker, J. R. (1992). Graphic Art Fundamentals. Goodheart-Willcox Company, Inc., USA.
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