@book{61251,
	author = {Smith, Edward H.},
	title = {Mechanical engineer's reference book},
	publisher = {Butterworth Heinemann,},
	year = { 1994.},
	address = {London},
	edition = {12th ed.},
	note = {http://www.amazon.com/Mechanical-Engineers-Reference-Book-R-136/dp/0750611952/ref=sr_1_1?s=books&ie=UTF8&qid=1413967560&sr=1-1&keywords=0750611952}
}