Template:Selected anniversaries/April 13: Difference between revisions

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||1889: Herbert Yardley born ... cryptologist and author.
||1889: Herbert Yardley born ... cryptologist and author.


||1892: Robert Watson-Watt born ... engineer, invented the Radar.
||1892: Robert Watson-Watt born ... engineer, invented the Radar. Pic.


||1894: Prince Baldassarre Boncompagni-Ludovisi died ... historian of mathematics and aristocrat. Pic.
||1894: Prince Baldassarre Boncompagni-Ludovisi died ... historian of mathematics and aristocrat. Pic.

Revision as of 06:13, 12 February 2019