1961 - Experiments in Sound (Hardcover) ISBN-13: 9780690277203 ISBN-10: 0690277202 Genres: Nonfiction, Science & Math ? 1951 - Experiments in Optical Illusion (Other) ISBN-13: 9780690275070 ISBN-10: 0690275072 Genres: Children's Books, Nonfiction, Science & Math, Engineering & Transportation 2 Experiments with a Microscope (Hardcover) ISBN-13: 9780690280043 ISBN-10: 0690280041 Genre: Children's Books ? |