@book{160986,
	author = {Estados Unidos. Department of labor and Estados Unidos. Department of labor},
	title = {Oil and Gas Well Drilling and Servicing e Tool},
	publisher = {Estados Unidos. Department of Labor},
	year = {2004},
	address = {Washington},
	note = {Sitio visitado por última vez en junio de 2004 ; Documento disponible en formatos html y pdf ; Navegadores de Internet ; Adobe Acrobat (PDF)},
	url = {http://www.osha.gov/SLTC/etools/oilandgas/servicing/servicing.html}
}