P. C. BUTLER (SANDIA NATIONAL LABORATORIES (SNL), ALBUQUERQUE, NM, AND LIVERMORE, CA (UNITED STATES))Sandia National Laboratories(Sandia National Laboratories)1999.
P. C. BUTLER (USDOE ASSISTANT SECRETARY FOR ENERGY EFFICIENCY AND RENEWABLE ENERGY, WASHINGTON, DC (UNITED STATES))Sandia National Laboratories(Sandia National Laboratories)1998.