@book{4226,
	author = {beck, leland.l},
	title = {System software an introduction to systems programming},
	publisher = {Pearson Education Publisher},
	address = {India},
	edition = {3rd},
	url = {https://libgen.is/book/index.php?md5=F8C743B594E4CCAE115D3463A49E9E47}
}