International Geophysical Calendar for the international years of the quiet sun, 1964 and 1965
1963 ◽
Vol 68
(18)
◽
pp. 5318
1963 ◽
Vol 68
(18)
◽
pp. 5318-5323
1964 ◽
Vol 26
(1)
◽
pp. 151-157
1979 ◽
Vol 44
◽
pp. 131-134
1954 ◽
Vol 40
(10)
◽
pp. 924-926
◽
1959 ◽
Vol 63
(580)
◽
pp. 268-268