Region E and the Sq Current System

[1]  D. F. Martyn,et al.  Electric currents in the ionosphere - The conductivity , 1953, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences.

[2]  D. F. Martyn.  Atmospheric tides in the ionosphere - I. Solar tides in the F2 region , 1947, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[3]  H. R. Mimno.  The Physics of the Ionosphere , 1937 .