Ward, P., & Kennedy, W. (1993). Maastrichtian ammonites from the Biscay region (France, Spain).
Chicago-čujuhus (17. p.)Ward, P., juo W. Kennedy. Maastrichtian Ammonites from the Biscay Region (France, Spain). 1993.
MLA-čujuhus (9. p.)Ward, P., juo W. Kennedy. Maastrichtian Ammonites from the Biscay Region (France, Spain). 1993.
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