TY - RPRT TI - NIST calibration services for liquid volume AU - Bean, Vern E AU - Espina, Pedro I AU - Wright, John D,Houser, John F AU - Sheckels, Sherry D AU - Johnson, Aaron N PY - 2006 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST SP 250-72 DO - 10.6028/NIST.SP.250-72 ER -