NavList thread: Slide rule identification
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12 Dec 2017, 04:05 | Alan S
12 Dec 2017, 09:18 | Ronald van Riet
12 Dec 2017, 17:31 | Ed Popko
12 Dec 2017, 19:12 | Alan S
15 Dec 2017, 22:40 | Roger W. Sinnott
16 Dec 2017, 01:02 | Alan S