Wienert, K. A. <br/><br/>
Notes on geomagnetic observatory and survey practice 
K. A. Wienert 
 - Paris  Unesco  1970 
 - 217p.  illus;bibl;index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geomagnetic ObservatoriesGeomagnetismMagnetic Instruments
<br/><br/><label>Universal Decimal Class. No.: </label>550.380.2+550.389  / WIE