"Proceedings of a conference held at NASA Lewis Research Center, Cleveland, Ohio ..."
Some issues also available via Internet at the NTRS NASA web site. Address as of 8/17/07: http://ntrs.larc.nasa.gov/search.jsp?N=0&Ntk=Title&Ntx=mode%20matchall&Ntt=Space%2BPhotovoltaic%2BResearch%2Band%2BTechnology%2BConference ; current access is available via PURL.
Microfiche. 12th-13th. [Washington, D.C. : National Aeronautics and Space Administration. microfiches : negative.
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