"Presented at the 2006 IEEE 4th World Conference on Photovoltaic Energy Conversion (WCPEC-4), held May 7-12, 2006 in Waikoloa, Hawaii."
Title from title screen (viewed June 23, 2008).
Mode of access: Internet from the NREL web site. Address as of 6/23/08: http://www.nrel.gov/docs/fy06osti/39842.pdf; current access available via PURL.