Knapp, David G & Gettemy, John W books & textbook
A NEW LONGITUDE EFFECT IN THE GEOMAGNETIC SOLAR DAILY VARIATION
Knapp, David G & Gettemy, John W
J Geophysical Res /1963T Pamphlet
Knapp, David G & Gettemy, John W
J Geophysical Res /1963T Pamphlet