"Counting Juvenile literature." . . . . "Set theory." . . "Natural history." . . . "Juvenile works"@en . . . "What in the world? : numbers in nature"@en . . "\"A rhyming nonfiction picture book that explores the numerical sets--one tail, two paws, four legs, etc.--that occur throughout the natural world.\"--"@en . . . . . . . "Counting." . . "Natural history Juvenile literature." . . "Set theory Juvenile literature." . .