Electricity, rocks in earth's crust, space beyond earth 

 - 61 pages :   colour illustrations ;   29 cm 
 - The scientific era series 3 .
 - The scientific era series 3 .
<br/><br/><label>ISBN: </label>9831980492 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science - Encyclopedias
<br/><br/><label>Dewey Class. No.: </label>503