TY - JOUR AU - Jon Shirley AU - F Levi AU - Thomas Heavner AU - Davide Calonico AU - Dai Yu AU - Steven Jefferts C2 - IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control DA - 2006-01-01 LA - en M1 - 53 PB - IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control PY - 2006 TI - Microwave Leakage-Induced Frequency Shifts in the Primary Frequency Standards NIST-F1 and IEN-CSF1 ER -