@book{30645,
	author = {Ziemer, Rodger .E.},
	title = {Principles of communications},
	publisher = {John Wiley & Sons Publisher},
	year = {2002},
	address = {New york},
	url = {https://libgen.is/book/index.php?md5=0C21A69CC19B18030CEBC033E21BBA25}
}