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Becker & House |
1994 |
International Devonian goniatite zonation, Emsian to Givetian, with new records from Morocco.
Courier Forschungsinstitut Senckenberg 169: 79-135, 10 text-figs., 7 pls., Frankfurt am Main.
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Ruan |
1996 |
Zonation and distribution of the early Devonian primitive ammonoids in South China.
In: Wang Hongzhen & Wang Xunlian: Centennial Memorial Volume Sun Yunzhu: Paleontology and Stratigraphy, 104-112, pl.14.1-2, text-fig.14.1-2, tabl.14.1
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