TY  - BOOK
AU  - Wienert, K. A. 
TI  - Notes on geomagnetic observatory and survey practice
SN  - 9231008161
PY  - 1970///
CY  - Paris
PB  - UNESCO
KW  - Geomagnetic ObservatoryObservations,geomagneticObservatory-geomagnetic-setup
ER  -