@book{31157,
	author = {Sinha, Manoranjan},
	title = {Space Flight Mechanics:},
	publisher = {Indian Insitiute of Technology},
	address = {Kharagpur},
	url = {http://video.snu.edu.in/index.php?id=5348&cat=Aerospace Engineering&course=Space Flight Mechanics&url=Phase2_Video/101105030/mod01lec01.mp4}
}