Levy, Richard C. · 4 obras en el catálogoObrasKobold Guide to Board Game DesignCComplete Idiot's Guide to Cashing in on Your InventionsComplete Idiot's Guide to Cashing in on Your InventionsInventing and patenting sourcebookPPlane talkPlane talk
CComplete Idiot's Guide to Cashing in on Your InventionsComplete Idiot's Guide to Cashing in on Your Inventions