Dr. Michael Ference of the Ford Motor Co. with a model of the sodium-sulfur battery to power electric vehicles. Dated October 3, 1966.
http://cgi.ebay.co.uk/1966-Ford-Motor-Electric-Vehicle-Battery-Press-Photo-/260780508196?pt=Art_Photo_Images&hash=item3cb7bac424
http://en.wikipedia.org/wiki/Sodium-sulfur_battery#Development
Popular mechanics article from Dec 1966 mentioning Dr. Michael Ference's Sodium-sulfur battery and other up and coming EV technology at the time.
http://books.google.ie/books?id=lykDAAAAMBAJ&lpg=PA77&ots=RPwXJ-6WCx&dq=Dr.%20Michael%20Ference%20ford%20battery&pg=PA77#v=onepage&q=Dr.%20Michael%20Ference%20ford%20battery&f=true