Discussion of 'Isotopic variation in fossils and matrix of the Cretaceous Red Chalk at Speeton and South Ferriby, Yorkshire, England' - Proceedings, Vol. 52, part 1, pp. 107-112, 1998
Sf. Mitchell et Cj. Underwood, Discussion of 'Isotopic variation in fossils and matrix of the Cretaceous Red Chalk at Speeton and South Ferriby, Yorkshire, England' - Proceedings, Vol. 52, part 1, pp. 107-112, 1998, P YORKS G S, 52, 1999, pp. 325-326