00258nam a2200109Ia 450000500170000000800410001708200160005810000170007424500200009126000280011130000090013920260205095852.0260111s9999||||xx |||||||||||||| ||und||  a531.6  K46E  aRobin Kerrod 0aInsights Energy  bOxford universityc1994  a57p.