@book{26429,
	author = {Singh, R.B.},
	title = {Introduction to modern physics},
	publisher = {New age international Publisher},
	address = {India},
	edition = {2nd},
	url = {https://libgen.is/book/index.php?md5=4EE61EBFAD8CDDCD4E98227FB7D436D1}
}