@book{21998,
	author = {Barua, Alok},
	title = {Industrial Instrumentation:},
	publisher = {Indian Insitiute of Technology},
	address = {Kharagpur},
	url = {http://video.snu.edu.in/index.php?id=2102&cat=Electrical Engineering&course=Industrial Instrumentation&url=Phase1_Video/108105064/lec16.mp4}
}