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46by Gradstein, Felix M., Davydov, Vladimir I., Hammer, ØyvindGet access
Published in Newsletters on Stratigraphy (2013)
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53by Aubry, Marie-Pierre, Gradstein, Felix M., Jansa, Lubomir F.Get access
Published in Micropaleontology (1990)
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57by Gradstein, Felix M., Huang, Zehui, Kristiansen, Inger L., Ogg, James G.Get access
Published in Canadian Journal of Earth Sciences (1993)
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