www.chemicalelements.com/elements/ni.html
www.nidi.org/index.cfm/ci-id/13.htm
redbaron.bishops.ntc.nf.ca/science/chem/nickel99/uses.htm
www.gfsnet.org/msweb/periodic%20table%3002/web%20pages/Ni.html
www.mbendi.co.za/indy/ming/nkcb/p0005.html
http://www.ahajokes.com/science_jokes.html