Authors: W. A. Cobban

  • Some middle Cenomanian (Upper Cretaceous) acanthoceratid ammonites from the Western Interior of the United States: USGS Professional Paper 1445 — W. A. Cobban

    Some middle Cenomanian (Upper Cretaceous) acanthoceratid ammonites from the Western Interior of the United States: USGS Professional Paper 1445 — W. A. Cobban