Su, Y.; Hou, H. (1994). The Early Devonian spiriferid brachiopod Borealispirifer n. gen. from the Balkash-Mongolia-Okhotsk Region, pp. 139-147. In: Yang, Z. (Ed.). Stratigraphy and Palaeontology of China 2. Geological Publishing House, Beijing, 240 pp.
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Su, Y.; Hou, H.
1994
The Early Devonian spiriferid brachiopod Borealispirifer n. gen. from the Balkash-Mongolia-Okhotsk Region, pp. 139-147. In: Yang, Z. (Ed.)