Haswani, Radhika <br/><br/>
First how things work :  encyclopedia / 
Radhika Haswani. 
 - London :   Dorling Kindersley,  2019. 
 - 136p. :  col. ill.;  29 cm. 
<br/><br/> Explains the inner workings of everyday utilities, from light bulbs and engines to roller coasters and laptops 
<br/><br/><label>ISBN: </label>978-0-2411-8879-8 
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<br/><br/><label>Dewey Class. No.: </label>Ref 621.8 H359 2019