Whitaker, W. (1877). The geology of the eastern end of Essex (Walton Naze and Harwich): Explanation of quarter sheet 48 S. E. with the adjoining part of 48 N. E.). Printed for H. M. Stationery off..

Whitaker, W. The Geology of the Eastern End of Essex (Walton Naze and Harwich): Explanation of Quarter Sheet 48 S. E. with the Adjoining Part of 48 N. E.). London: Printed for H. M. Stationery off., 1877.

Whitaker, W. The Geology of the Eastern End of Essex (Walton Naze and Harwich): Explanation of Quarter Sheet 48 S. E. with the Adjoining Part of 48 N. E.). Printed for H. M. Stationery off., 1877.