Alexander, H., H., B., B.(1993).The Timetables of technology : a chronology of the most important people and events in the history of technology / Bryan Bunch, Alexander Hellemans .:Simon n Schuster.
Gaya MLA
Hellemans, Alexander., Bunch, Bryan, H.."The Timetables of technology : a chronology of the most important people and events in the history of technology / Bryan Bunch, Alexander Hellemans".:Simon n Schuster,1993.Textbook.