TY  - BOOK
AU  - Beynon W J G
TI  - Some ionosphberic results obtained during the international geophysical year
T2  - International scientific radio union, Ursi monographs ed by Edward V Appleton etc
U1  - U2:1986b4, K0 
PY  - 1960///
KW  - PHYSICAL GEOGRAPHY
ER  -