@book{49459,
	author = {Shadwell, Arthur },
	title = {Industrial Efficiency : },
	publisher = {Longmans, Green, And Co,},
	year = {1909.},
	address = {London :},
	note = {Includes index.},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B13-08536.pdf}
}