TY - GEN AU - Thomas, Douglas B C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1980-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.80-2028 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1980 TI - Information and guidelines for a proposed laboratory accreditation and product certification program for photovoltaic energy conversion systems: ER -