Staff, H. von; Wedekind, R. (1910). Der oberkarbone Foraminiferensapropelit Spitzbergens. Bulletin of the Geological Institution of the University of Uppsala. 10: 81–123.
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Staff, H. von; Wedekind, R.
1910
Der oberkarbone Foraminiferensapropelit Spitzbergens
Bulletin of the Geological Institution of the University of Uppsala