Šlifuokliai Papildoma Dešimtainis halogen lamp history staigmena Giotto Dibondonas tuberkuliozė
The Light bulb By: Allyson Carter. Changed society, history, and everyday life. replaced fire –torches, candles, and oil and gas lamps The light bulb. - ppt download
The History of Incandescent Light Bulbs – BulbAmerica