Digital Design, Principals and Practices, 3rd Edition
John F. Wakerly
Teach Yourself Improve Your German
Heiner Schenke & Paul Coggle
Circuit Analysis, Theory and Practice, 5th Edition
Allan H. Robbins & Wilhelm C. Miller
Computational Electronics
Dragica Vasileska & Stephen M. Goodnick
Circuit Design with VHDL
Volnei A. Pedroni