HARLOW, R. A. M. (1999). YOUNG DISCOVERERS ENERGY AND POWER ENVIRONMENTAL FACTS AND EXPERIMENTS.
Chicago-referens (17:e uppl.)HARLOW, ROSIE AND MORGAN. YOUNG DISCOVERERS ENERGY AND POWER ENVIRONMENTAL FACTS AND EXPERIMENTS. 1999.
MLA-referens (9:e uppl.)HARLOW, ROSIE AND MORGAN. YOUNG DISCOVERERS ENERGY AND POWER ENVIRONMENTAL FACTS AND EXPERIMENTS. 1999.
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