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1986
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Volume 19 (1986) : Collision Tectonics Volume 20 (1986) : Palaeoecology and Biostratigraphy of Graptolites Volume 21 (1986) : North Atlantic Palaeoceanography Volume 22 (1986) : The English Zechstein and Related Topics Volume 23 (1986) : Habitat of Palaeozoic Gas in N.W. Europe Volume 24 (1986) : The Nature of the Lower Continental Crust Volume 25 (1986) : Sedimentation in the African Rifts