Title from title screen (viewed on May 28, 2009). "Presented at the 2008 SPIE Optics+Photonics Meeting Reliability of Photovoltaic Cells, Modules, Components and Systems, San Diego, California, August 10-14, 2008." "November 2008."
Mode of access: Internet from the NREL web site. Address as of 5/28/09: http://www.nrel.gov/docs/fy09osti/42811.pdf; current access available via PURL.