Chemistry and Technology of the Cosmetics and Toiletries Industry S. D. Williams, W. H. Schmitt E-Book (pdf)

The end of medicine as we know it - and why your health has a future Harald H. H. W. Schmidt E-Book (pdf)

Säure-Basen-Gleichgewicht des Menschen W. Ehrhardt, H. Neumann, L. Schmidt E-Book (pdf)