Author:

Butterworth,M.A.

Year:

1964

Title:

The distribution of Densosporites sphaerotriangularis, in the Westphalian B of the Western Pennine Hard Coal Fields of England.

Foreign title:

Die verteilung der Densosporites sphaerotriang. Ularis im Westfal B der Westpenninischen Steinkohlenfelder Englands

Reference:

Butterworth,M.A. (1964) The distribution of Densosporites sphaerotriangularis, in the Westphalian B of the Western Pennine Hard Coal Fields of England. [ Die verteilung der Densosporites sphaerotriang. Ularis im Westfal B der Westpenninischen Steinkohlenfelder Englands ] Fortschritte in der Geologie von Rheinland und Westfalen Vol. 12 P. 317- 330

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