TY  - BOOK
AU  - Zmuda, Alfred J., ed.
TI  - World magnetic survey, 1957-1969
T2  - International Association of Geomagnetism and Aeronomy Bulletin; No. 28
PY  - 1971///
CY  - Paris
PB  - International Union of Geodesy and Geophysics
KW  - IuggIaga
ER  -