| link
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From
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To
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Geolocation
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Author - title
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Year
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| details | Famennian | Canada(Yukon) | Norris,A.W. Reconnaissance Devonian stratigraphy of northern Yukon Territory and Northwestern District of MacKenzie | 1968 | |
| details | Givetian | Spitsbergen | Allen,K.C. Spore assemblages and their stratigraphical application in the Lower and Middle Devonian of North and Central Vestspitbergen | 1967 | |
| original | Givetian | Spitsbergen | Allen,K.C. Lower and Middle Devonian spores of North and Central Vestspitsbergen | 1965 |