NNumber PuzzlesNumber Puzzlesde Jenny Tyler, Graham RoundEdiciones (1)Number Puzzles (Usborne Brainbenders) (1980)E.D.C. Publishing · inglés · ISBN 9780881100501Más obras de Jenny TylerMealtime words1990Animal Mazes (Usborne Maze Puzzles)Who's Making That Smell (Flap Books Series)
