Keywords: Théophile Ernest de Donder.jpg Théophile Ernest de Donder http //w3 pppl gov/~hammett/courses/gpp1/intro/solvay1927 html 1927 Author PD-old author died >70 years http //w3 pppl gov/~hammett/courses/gpp1/intro/solvay1927 html Théophile de Donder 1927 |