SILURIAN-DEVONIAN BOUNDARY

[1] BOUCEK B, 1966, ACTA MUSEI NAT PRAGU, VB 22

[2] HOLLAND C. H., 1963, BULL BRIT MUS [NAT HIST] GEOL, V8, P95

[3] HOLLAND C. H., 1965, GEOL MAG, V102, P213

[4] HOLLAND CH, 1965, GEOL MAG, V102, P463

[5] Kozlowski R., 1929, Palaeontologia Polonica, V1, P1

[6] White E.I., 1950, B BRIT MUS NAT HIST, V1, P51

[1] BOUCEK B, 1966, ACTA MUSEI NAT PRAGU, VB 22

[2] HOLLAND C. H., 1963, BULL BRIT MUS [NAT HIST] GEOL, V8, P95

[3] HOLLAND C. H., 1965, GEOL MAG, V102, P213

[4] HOLLAND CH, 1965, GEOL MAG, V102, P463

[5] Kozlowski R., 1929, Palaeontologia Polonica, V1, P1

[6] White E.I., 1950, B BRIT MUS NAT HIST, V1, P51