Wikipedia:Articles for deletion/Karl Bleyl
per  and the two in-depth sources found by Hannes Röst. He doesn't appear to pass  but (for most of its criteria) amateur status is irrelevant to that: it's about significance of scholarly contributions, not about job titles
— User:David, 22:52, 12 August 2021 (UTC)
Stance: keep
Cited policy: WP:GNG||WP:PROF (Wikipedia:Notability)