@book{20785,
	author = {DELOACH, Jim c. & AMBROSIO, Frank  J. and TOCCI, Ronald J.},
	title = {Digital Systems: Principle and Applications/},
	publisher = {Prentice-Hall, Inc,},
	year = {1998.},
	address = {New Jersey;},
	edition = {7th.},
	note = {INCLUDES  Appendix.}
}