http://www.api.org/ - American Petroleum Institute
http://www.fondonorma.org.ve/ - Fondo para la Normalización
y Certificación de la Calidad
http://www.sae.org/ - Society of Automotive Engineers
http://www.kittiwake.com/ - Empresa Britanica de Productos en Linea
para Analisis de Aceites
http://www.mantenimientomundial.com/ - Mantenimiento Mundial
http://www.stle.com/ - Society of Tribologist and Lubrication Engineers
http://www.lubecouncil.com/ - International Council for Machinery
Lubrication
http://www.chemistry.org/ - American Chemical Society
http://www.itctribology.org/ - International Tribolgy Council
http://www.nlgi.com/ - National Lubricating Grease Institute
http://www.iso.ch/ - International Organization for Standardization
http://www.astm.org/ - American Society for Testing and Materials
http://www.agma.org/ - American Gear Manufactures Association
http://www.ansi.org/ - American National Standards Institute
http://www.chemistry.org/ - American Chemical Society
http://www.din.de/ - Deutsches Institut Fur Normung e.V.
http://www.japanauto.com/ - Japan Automobile Manufacturers Association
http://www.japt.org/ - Japan Association of Petroleum Technology
http://www.pmaa.org/ - Petroleum Marketers Association of America
http://www.ilma.org/ - Independent Lubricants Manufacturers Association
http://www.acea.be/ - European Automobile Manufacturers Association
http://www.iea.org/ - International Energy Agency
http://www.autonews.com/ - Automotive News
http://www.dieselpub.com/ - Diesel Progress
http://www.flasia.com.ph/ - Fuel & Lubes Asia Publications,
Inc.
http://hcasia.safan.com/ - Hydrocarbon Asia
http://www.petroleumworld.com/ - Petroleum World.com
http://www.oilanalysis.com/ - Oils Analysis.com
http://www.practicingoilanalysis.com/ - Practicing Oil Analysis