Whitaker, W. “On a Raised Beach at Portland Bill, Dorset”. Quarterly Journal of the Geological Society, vol. 25, no. 1-2, pp. 305-, https://doi.org/10.1144/gsl.jgs.1869.025.01-02.54.
Whitaker, W. (n.d.). On a Raised Beach at Portland Bill, Dorset. Quarterly Journal of the Geological Society, 25(1-2), 305-305. https://doi.org/10.1144/gsl.jgs.1869.025.01-02.54
Whitaker, W. “On a Raised Beach at Portland Bill, Dorset”. Quarterly Journal of the Geological Society 25, no. 1-2 (n.d.): 305-5. https://doi.org/10.1144/gsl.jgs.1869.025.01-02.54.
Whitaker W. On a Raised Beach at Portland Bill, Dorset. Quarterly Journal of the Geological Society. 25(1-2):305-.