1. Reaction of tooth surfaces with one ppm of fluoride as sodium fluoride;Brudevold;J. dent. Res.,1957
2. The distribution and excretion of radiofluorine in the human;Carlson,1960
3. Stannous fluoride dentifrices. An investigation into the availability of the fluoride and its retention in human subjects;Duckworth,1964
4. The uptake and release of fluorine-18 by human intact surface enamel in vitro;Duckworth;Archs oral Biol.,1967
5. The distribution of dentifrice fluoride during and after toothbrushing;Duckworth;Adv. Fluor. Res. dent. Caries Prev.,1965