00947cam a2200277 4500 76328130 TxAuBib 20031217120000.0 031217s2001||||||||||||||||||||||||eng|u 9780064451390 pbk. $4.99 0064451399 pbk. $4.99 NjBwBT NjBwBT TxAuBib Showers, Paul. Hear your heart / by Paul Showers ; illustrated by Holly Keller. Rev. and newly illustrated ed. New York, NY : HarperCollins, 2001. 33 p. : col. ill. ; 21 x 25 cm. Let's read-and-find out science "Stage 2.". Imprint on spine: HarperTrophy. A simple explanation of the structure of the heart and how it works. 20031217. Heart. Keller, Holly, ill. Let's read-and-find out science.