TY  - GEN
AU  - Smith, Ernest K
C2  - , National Institute of Standards and Technology, Gaithersburg, MD
DA  - 1957-01-01 05:01:00
DO  - https://doi.org/10.6028/NBS.CIRC.582
LA  - en
PB  - , National Institute of Standards and Technology, Gaithersburg, MD
PY  - 1957
TI  - Circular of the Bureau of Standards no. 552::worldwide occurrence of sporadic E
ER  -