TY - JOUR AU - James Schmidt AU - Charles Ehrlich AU - S Tison C2 - Metrologia DA - 1999-06-01 LA - en M1 - 36 PB - Metrologia PY - 1999 TI - A Model for Drag Forces in the Crevice of Piston Gages in the Viscous and Molecular Flow Regimes ER -