Template:Selected anniversaries/April 13: Difference between revisions

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||1879: Francesco Severi born ... mathematician.
||1879: Francesco Severi born ... mathematician.


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


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

Revision as of 19:02, 25 February 2019