TY - MANSCPT AU - Pascoe,Elaine TI - Animals Without Backbones SN - 0-8239-6311-X PY - 2003/// CY - New York PB - The PowerKids Press, The Rosen Publishing Group KW - Invertebrates N2 - Describes the physical characteristics, behavior, and habitat of animals that do not have internal skeletal systems ER -