@book{1314,
	author = {Dass, H.K.},
	title = { Advanced Engineering Mathematics.},
	publisher = {S. Chand & Company,},
	year = {2015.},
	address = {New Delhi :},
	url = {https://books.google.com.pk/books/about/Advanced_Engineering_Mathematics.html?id=Xfo_AQAAIAAJ&source=kp_book_description&redir_esc=y}
}