Topics (ro): | despre savanti - metodologie; Davy, Humphry; Mayer, Julius-Robert; Faraday, Michael; Liebig, Justus; Gerhardt, Charles; Helmholtz, Hermann | Subiecte (en): | about scientists - methodology; Davy, Humphry; Mayer, Julius-Robert; Faraday, Michael; Liebig, Justus; Gerhardt, Charles; Helmholtz, Hermann | Reviews: | |
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