Data from the gemagnetic, geoelectric and scismological observatories :  National Geophysical Research Institute, Hyderabad 

 - Hyderabad :  National Geophysical Risearch Instiute,  1969 
 - iv, 84 p. :  tables ;  29 cm. 
<br/><br/> Supplement no. 5 to bulletin of the NGRI March 1969 
<br/><br/>Pt. I. Geomagnetic data (hourly values, magnetic storms, K and C indices etc.) - pt. II. rapid variations of earth's electromagnetic field - pt. III. Seismological data 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geomagnefism--Observations<br/>Seismology--Observations
<br/><br/><label>Subjects--Index Terms: </label>Geoelectvic observations. 
<br/><br/><label>Dewey Class. No.: </label>538.7