TY - JOUR AU - Jousten, Karl AU - Filippelli, A AU - Tilford, C AU - Redgrave, Fiona C2 - Journal of Vacuum Science and Technology A DA - 1997-12-01 LA - en M1 - 15 PB - Journal of Vacuum Science and Technology A PY - 1997 TI - Comparison of the Standards for High and Ultrahigh Vacuum at Three National Standards Laboratories ER -