1. 01. English Non Fiction How did numbers begin? / by Sitomer, Mindel. Publication: New York : Crowell, 1976 . 33 p. : 21 x 23 cm. Date:1976 Availability: Copies available: (2), Actions:
2. 01. English Non Fiction Binary numbers / by Watson, Clyde. Publication: New York : Crowell, 1977 . 33 p. : 21 x 23 cm. Date:1977 Availability: Copies available: (1), Actions: