C.W. Wright & W.J. Kennedy The Ammonoidea of the Plenus Marls and the Middle Chalk, Palaeontographical Society, 1981; and Wright & Kennedy's The Ammonoidea of the Lower Chalk Parts 1 to 5 complete, 1984-96; quarto, original printed wraps; ex-library with stamps & labels, the text and many plates unaffected. (6)