Scheifler, Robert W.,  1954- <br/><br/>
X Window System :  Extension Library : X Version 11, Release 6 and 6.1 / 
Robert W. Scheifler, James Gettys ; edited by Al Mento and Donna Converse. 
 - Boston :  Digital Press,  c1997. 
 - xi, 819 p. :  ill. ;  24 cm.