Author:

Gгrka,H.

Year:

1969

Title:

Microorganisms of the Ordovician of Poland.

Foreign title:

Microorganismes de l'Ordovicien de Pologne.

Reference:

Gгrka,H. (1969) Microorganisms of the Ordovician of Poland. [ Microorganismes de l'Ordovicien de Pologne. ] Palaeontologia Polonica # 22 P. 1- 102

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