DISCOVER THE WONDER, GRADE 3 - HEIL, DAVID (SCOTT, FORESMAN AND COMPANY USA, 1996)
Keywords: SCIENCE; EDUCATION; CLIMATES AND ADAPTATIONS; PLANTS, FOOD CHAINS AND NUTRITION; NATURAL RESOURCES; SIMPLE MACHINES; ENERGY; ANIMAL MOVEMENT; TRANSPORTATION; SOUND ENERGY AND HEARING; PEOPLE; POLLUTION AND RECYCLING