TY  - RPRT
TI  - Comparison of percentage of total time of occurrence of second-multiple Es reflections and that of fEs in excess of 3 Mc 
PY  - 1946
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IRPL 35
DO  - 10.6028/NBS.IRPL.35
ER  -