@book{569,
	author = {Palais, Joseph C.},
	title = {Fiber Optic Communications.},
	publisher = {Pearson,},
	year = {2005.},
	address = {New Delhi :},
	edition = {5th ed.},
	url = {https://books.google.com.pk/books/about/Fiber_Optic_Communications.html?id=0wBTAAAAMAAJ&source=kp_book_description&redir_esc=y}
}