title: On Karl Hadeler becoming 70.
authors.affiliation: slevin@princeton.edu
authors.forename: Simon
authors.initials: S
authors.lastname: Levin
mesh_terms: D001695:Biology / Q000266:history* / Q000379:methods; D005858:Germany; D049673:History, 20th Century; D049674:History, 21st Century; D008433:Mathematics / Q000266:history*; D008962:Models, Theoretical