TY - RPRT TI - The international system of units (SI) - conversion factors for general use AU - Butcher, Kenneth S AU - Crown, Linda D AU - Gentry, Elizabeth J PY - 2006 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST SP 1038 DO - 10.6028/NIST.SP.1038 ER -