The clock by Spilsbury, Richard and Spilsbury, Louise
The radio by Spilsbury, Richard and Spilsbury, Louise
The television by Spilsbury, Richard and Spilsbury, Louise
The oil industry by Spilsbury, Richard & Spilsbury, Louise
Dams and hydropower by Spilsbury, Richard & Spilsbury, Louise
Wind power by Spilsbury, Richard and Spilsbury, Louise
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