The geology of the N. W. part of Essex and the N. E. part of Herts. With parts of Cambridgeshire and Suffolk. (Explanation of sheet 47 of the map (one-inch) of the Geological survey of England and Wales)
Whitaker, William 1836-1925; Penning, W. H; Dalton, William Herbert 1848-; Bennett, Francis James 1845-