Solar, geomagnetic, and ionospheric phenomena as indices of solar activity.
Series: Geophysical research papers ;; no. 54
Publisher: Geophysics Research Directorate, Air Force Cambridge Research Center
Published: 1956
Place of publication: Bedford, Mass
Language: eng
Number of pages: 76
Subjects: Geomagnetism.; Ionosphere.; Sun.
Notes: AFCRC-TR-56-213.
"ASTIA document no. AD-110221."