TY - RPRT TI - Pulse transition duration measurements and standards at NBS - 1975 to 1988 AU - Gans, W L AU - Nahman, N S AU - Andrew, J R AU - Baldwin, E E PY - 2000 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 6550 DO - 10.6028/NIST.IR.6550 ER -