Stewart, H.A. and Jamieson, A.J., 2019. The five deeps:
The location and depth of the deepest place in each of the
world's oceans. Earth-Science Reviews, 197, no.102896.
[www.sciencedirect.com]

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Yours,

Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)