A monograph of the Foraminifera of the Crag /

حسب Jones, T. Rupert (Thomas Rupert), 1819-1911
منشور في 1866

A monograph of the Crag Mollusca : with descriptions of shells from the upper Tertiaries of the British Isles /

حسب Wood, Searles V. (Searles Valentine), 1798-1880
منشور في 1848