TY  - BOOK
ED  - National Institute of Sciences of India. Calcutta.
TI  - Problems of the ionosphere: a symposium
U1  - 551.51 
CY  - Calcutta
PB  - N I S I
KW  - Atmospheric science
N1  - Content : Mitra S K : Report of the present state of our knowledge of the ionosphere
ER  -