Creative Experimenting Using Rubber Bands For Adventurous Minds of All Ages! Tracy David Heftet / 2006 / Engelsk
Creative Systems Engineering and Small Business R&D Project Management A Survival Guide for Technical Managers Tracy David Heftet / 2008 / Engelsk
Time Management Smart Hacks To Get Things Done, Stop Procrastination Habit And Increase Focus And Productivity Tracy David Heftet / 2018 / Engelsk
Nietzsche, God, and the Jews His Critique of Judeo-Christianity in Relation to the Nazi Myth Santaniello Weaver Heftet / 1994 / Engelsk
