1. The Old Red Sandstone of Brown Clee Hill and the adjacent area;Ball;Bull. Br. Mus. nat. Hist., Geol.,1961
2. Sur les Spirorbes du terrain houiller de Bruay (Pas-de-Calais);Barrois;Annls Soc. géol. N.,1904
3. On the occurrence of the Serpulid Spirorbis Daudin, 1800 (Annelida, Polychaetia, Sedentarida) in thin sections of Triassic rocks of Europe and Iran;Bronnimann;Riv. ital. Paleont. Stratign,1972
4. Anthracopupa britannica sp. nov., a land gastropod of the uppermost Coal Measures of northern Worcestershire;Cox;Q. Jl geol. Soc. Lond.,1926
5. On our Present Knowledge of the Invertebrate Fauna of the Lower Carboniferous or Calciferous Sandstone Series of the Edinburgh Neighbourhood, especially of that Division known as the Wardie Shales; and on the First Appearance of certain Species in these Beds