Région du Nord; Flandre, Artois, Boulonnais, Picardie,
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| Main Author: | |
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| Other Authors: | , |
| Format: | Book |
| Language: | French |
| Published: |
Paris,
Masson,
1973.
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| Series: | Guides géologiques régionaux.
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| Subjects: |
| Physical Description: | 175 p. illus. 24 cm. |
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| Bibliography: | Bibliography: p. [6] |
| ISBN: | 2225367954 |