Literature 1974
S. Böhme
Division of Radiophysics, C.S.I.R.O., Sydney, Radio. physics Publication RPP
1554 (H. R. Dickel, J. V. Wall, 11.131.020), 1615 (A. C. Riddle, 11.074.042), 1645
(D.J. McLean, K. V. Sheridan, 10.077.062), 1664 (G. A. Dulk, G. J. Nelson, ...