On the Launch Pad: A Counting Book about Rockets (Know Your Numbers)
by Michael Dahl
ISBN 13: 9781404811195
Format: Paperback (24 pages) Publisher: Picture Window Books Published: Jul 2004
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Pull, Life, and Lower: A Book about Pulleys (Amazing Science: Simple Machines)
ISBN 13: 9781404819085
Format: Paperback (24 pages) Publisher: Picture Window Books Published: Jul 2002