by Rodney Dale
Paperback
ISBN: 978-0-7123-0292-0
ISBN-10: 0-7123-0292-1
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by Rodney DalePaperback
ISBN: 978-0-7123-0292-0 ISBN-10: 0-7123-0292-1 |
| See also: | ||
| 1994 | Paperback | Timekeeping (Discoveries and Inventions) |
| 1993 | Hardcover | Timekeeping (Discoveries and Inventions) |