- Versions of the international System of Units | 0, 0, 1
- International System of Units | 37, 138, 13
- Physics | 276, 25k, 429
- Natural science | 0, 30k, 686
- Science | 0, 36k, 821
- Ciro Santilli's Homepage | 238, 147k, 2k
- Electron charge | 32, 126, 1
- Kilogram | 37, 42, 1