"Object-Oriented Programming with the X Window System Toolkits by Jerry D. Smith is a comprehensive textbook published in 1991 by Wiley & Sons, Incorporated, John. The book covers the subject areas of Operating Systems / Unix, Programming / Object Oriented, and Data Processing. Written in English and available in hardcover format, this 576-page textbook is a valuable resource for students and professionals looking to deepen their understanding of object-oriented programming within the X Window System toolkits."
eBay