- Cărți electroniceA Preliminary Discourse on the Study of Natural PhilosophyJohn F. W. Herschel
- Cărți electronicePreliminary Discourse on the Study of Natural PhilosophyJohn F. W. Herschel
- Cărți electronicePreliminary Discourse on the Study of Natural PhilosophyJohn F. W. Herschel
- Cărți electronicePreliminary Discourse on the Study of Natural PhilosophyJohn F. W. Herschel
- Cărți electronicePreliminary Discourse on the Study of Natural PhilosophyJohn F. W. Herschel