@book{22456,
	author = {Chawla, Anoop},
	title = {Computer Aided Design and Manufacturing:},
	publisher = {Indian Insitiute of Technology},
	address = {Delhi},
	url = {http://video.snu.edu.in/index.php?id=2560&cat=Mechanical Engineering&course=Computer Aided Design and Manufacturing&url=Phase1_Video/112102101/lec07.mp4}
}