@misc{780131, author = {R Adair and D. Russell}, title = {A Calibration Service for 30 MHz Attenuation and Phase Shift}, year = {1988}, number = {250-32}, month = {1988-04-01 00:04:00}, publisher = {Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD}, language = {en}, }