TY  - BOOK
ED  - International Union of Geodesy and Geophysics
TI  - XX General Assembly IUGG, Vienna, 11-24 August 1991 : UNION, program and abstracts
PY  - 1991///
CY  - Vienna
PB  - International Association of Geomagnetism and Aeronomy
KW  - Solar PhysicsPlanetary Physics
ER  -