Statistical studies of quasi-periodic variables with ilustrative examples from geophysics :   Reprints of three papers from the Journal of Terrestrial Magnetism and Atmospheric Electricity 

 - Washington :   Carnegie Institution of Washington. Department of Terrestrial Magnetism,   1959. 
 - 60 p. :   gráfs, láms plegs. ;   24 cm. 
<br/><br/> Contenido: Terrestrial-magnetic activity and its relations to solar phenomena / by Julius Bartels. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MAGNETISMO TERRESTRE