Links

Petroleum

http://www.petroleum.co.uk
http://www.aip.com.au
http://api-ec.api.org/intro/index_noflash.htm
http://www.geo.wvu.edu/~jtoro/petroleum/petrol_links.html

Oil/Fat

http://www.fosfa.org
http://www.aocs.org

Automotive

http://www.sae.org/servlets/index
http://www.automotive-links.com

Chemical

http://www.liv.ac.uk/chemistry/links/links.html
http://chemistry.about.com
http://aoac.org
http://www.chemie.fu-berlin.de/chemistry/general/units_en.html

General

http://kncv.nl
http://www.knovel.com/knovel2/default.jsp
http://www.elsevier.com/inca/ftree/?key=B1CAC
http://www.astm.org/cgi-bin/softcar.exe/index.shtml?E+mystore
http://www.iso.ch/iso/en/isoonline.openpage
http://www.nen.nl
http://www2.din.de
http://huperphysics.phy-astr.gsu.edu/hbase/hframe.html