Mapa geomagnético, península ibérica: isogonas; declinación oeste, an̂o. 1970.
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| Format: | Map |
| Language: | Spanish |
| Published: |
[Madrid],
[publisher not identified] ;
1971.
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| Item Description: | Accompanied by text. 10 pages. Cartographic material. |
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| Physical Description: | 1 map : color ; 47 x 62 cm. folded in cover 25 x 17 cm. |