Artikel 15, p. 562-578 - Editie 6 - 1926
INQUIRY TOOTHBRUSH. Section of the H. C. F. D. I. August 5th 1926 Geneva.. The Inquiry re toothbrushes has shown that upon this subject many colleagues still hold opinions wich are quite out of date. The H. C. consider it therefore their urgent duty to put forward standardized methods for the...
Lees artikel (pdf)