Cannot idendify with Williams, Hywel, the pharmacist; nor Williams, Hywel, 1953- , author of: Social work and the Welsh language.
Dermatology, c1997: CIP contributing author p. (Williams, Dr. H.C.; Dermato-Epidemiology Research Unit, Univ. Hosp., Queen's Med. Centre, Nottingham) pub. info. (H.C. Williams)
The challenge of dermato-epidemiology, 1997: CIP t.p. (Hywel C. Williams)