TY  - BOOK
AU  - x, x
AU  - Frihagen,Jon
TI  - Electron density profiles in ionosphere and expospher: Proceedings of the NATO advanced study institute held  at Finse, Norway, April 1965
SN  - x
U1  - 551.5145/FRE 
PY  - 1966///
CY  - Amsterdam
PB  - North - Holland Pub.
KW  - Nato
N1  - x
ER  -