@book{211,
	author = {Jain, R. P. },
	title = {Modern digital electronics /},
	publisher = {McGraw-Hill,},
	year = {c1997 [reprinted 2001, 1999].},
	address = {New Delhi ;},
	edition = {2nd ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0668/2006041929-d.html}
}