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Charles Helm has written 2 work(s)
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Paperback:
9781771601337 | Rocky Mountain Books, December 8, 2015, cover price $30.00
Hardcover:
9781897066065 | Owlkids, September 1, 2004, cover price $16.95 | About this edition: While rafting down the creek, two young boys made an unexpected discovery of dinosaur footprints on the rocks lining the waterway which soon led to a full investigation by professional scientists and the uncovering of an entire dinosaur bone bed.
Paperback:
9781897066072 | Owlkids, August 1, 2004, cover price $6.95 | About this edition: While rafting down the creek, two young boys made an unexpected discovery of dinosaur footprints on the rocks lining the waterway which soon led to a full investigation by professional scientists and the uncovering of an entire dinosaur bone bed.
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