TY - GEN AU - Leland T Sogn AU - Catherine Barclay C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1949-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.CIRC.480 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1949 TI - Circular of the Bureau of Standards no. 480::fundamental techniques in the frequency adjustment of quartz crystals ER -