@book{788,
	author = {Haven,Mary C and Haven, Mary C.},
	title = {Laboratory instrumentation },
	publisher = {Wiley,},
	year = {1995.},
	address = {New Delhi :},
	edition = {4th ed.},
	url = {https://books.google.com.pk/books?id=z9SzvsSCHv4C&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false}
}