1. A study of signal fading;Appleton;J. Inst. Elect. Eng.,1928
2. Regularities and irregularities in the ionosphere-I;Appleton,1937
3. A note on the “sluggishness” of the ionosphere;Appleton;J. Atmosph. Terr. Phys.,1953
4. Ionospheric absorption measurements throughout a sunspot cycle;Appleton,1949
5. Conductivity of the ionosphere;Baker,1953