en.wikipedia.org
en.wikipedia.org
en.wikipedia.org
dispatch.com
The Columbus Dispatch
https://www.dispatch.com › obituaries › pwoo0476864
prabook.com
agu.org
youtube.com
link.springer.com
iag-aig.org
iag-aig.org
https://www.iag-aig.org › topic › 212
imslp.org
iau.org
International Astronomical Union
https://www.iau.org › administration › membership › individual › 2111
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