1. 01. English Non Fiction How heavy is heavy? : science projects with weight / by Gardner, Robert, Publication: . 48 pages : , "Originally published as Heavy-Duty Science Projects with Weight in 2003." 24 cm. Availability: Copies available: (1), Actions:
2. 01. English Non Fiction How high is high? : science projects with height and depth / by Gardner, Robert, Publication: . 48 pages : , "Originally published as Far-out science projects with height and depth: How high is up? How low is down? in 2003." 24 cm. Availability: Copies available: (1), Actions: