Charles Edward Wallis and London's Toothbrush Clubs: 1909 style.
D000328:Adult; D002648:Child; D006267:Health Education, Dental; D049673:History, 20th Century; D006801:Humans; D007223:Infant; D008131:London; D012571:School Dentistry / Q000266:history*; D014076:Tooth Diseases / Q000517:prevention & control; D014099:Toothbrushing / Q000295:instrumentation