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Items: 2

1.

End-cretaceous brachiopod extinctions in the chalk of denmark.

Surlyk F, Johansen MB.

Science. 1984 Mar 16;223(4641):1174-7.

PMID:
17742931
2.

Impact theory of mass extinctions and the invertebrate fossil record.

Alvarez W, Kauffman EG, Surlyk F, Alvarez LW, Asaro F, Michel HV.

Science. 1984 Mar 16;223(4641):1135-41.

PMID:
17742919

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