Author:

Lewis,H.P.

Year:

1940

Title:

The microfossils of the Upper Caradocian Phosphate deposits of Montgomeryshire, North Wales

Reference:

Lewis,H.P. (1940) The microfossils of the Upper Caradocian Phosphate deposits of Montgomeryshire, North Wales Annals and Magazine of Natural History,(London),Series 11 Vol. 5 # 25 P. 1- 39

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