TY - GEN AU - F Walls AU - Eva Ferre-Pikal C2 - Wiley Encyclopedia of Electrical and Electronics Engineering DA - 1999-01-01 LA - en M1 - 12 PB - Wiley Encyclopedia of Electrical and Electronics Engineering PY - 1999 TI - Frequency Standards, Characterization, UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=105599 ER -