Some diplograptids from the British Lower Silurian
Packham, G H
Article
1962
Palaeontology
5
498--526
BioStor
English
London, Palaeontological Association, 1957-
BioStor: https://biostor.org/reference/166301
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https://www.biodiversitylibrary.org/permissions/
http://creativecommons.org/licenses/by-nc/3.0/
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