5695535
9788424119676
With a clever question-and-answer format, realistic and detailed illustrations of concepts, and topic-related organization of material, this 20-volume reference is highly informative and entertaining.Steve Parker is the author of 'Los Tuneles Son Redondos / I Wonder Why Tunnels Are Round (Spanish Edition)', published 1996 under ISBN 9788424119676 and ISBN 8424119673.
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