Corrientes telúricas
By: Observatorio Central Geofísico de Toledo.
Contributors: Instituto Geográfico y Catastral (Spain)
Publisher: Talleres Del Instituto Geográfico y Catastral
Published: 1952
Place of publication: Madrid
Language: spa
Subjects: Geomagnetism -- Spain.
Notes: At head of title:  Instituto Geografico y Catastral.