00920cam a2200289 4500 127796584 TxAuBib 20090831120000.0 080129s2009||||||||||||||||||||||||eng|u 2008003820 9781590369548 hdc. 1590369548 hdc. 9781590369555 soft cover : alk. paper 1590369556 soft cover : alk. paper DLC DLC DLC TxAuBib Richardson, Gillian. Ecosystems / Gillian Richardson. New York, NY : Weigl Publishers, 2009. 48 p. ; 26 cm. Science Q & A Includes index. BL 6.7. 20091230. Biotic communities Miscellanea Juvenile literature. Science Q & A. https://catdir.loc.gov/catdir/toc/ecip089/2008003820.html