Dafstb Heft 240 --39-link--39- Link

Reinforced concrete mechanics — stress distribution, cracking behavior under short-term loading.

It looks like you're referencing a specific publication: (likely from the Deutscher Ausschuss für Stahlbeton – German Committee for Reinforced Concrete). Dafstb Heft 240 --39-LINK--39-

The --39-LINK--39- part is ambiguous — possibly a placeholder or formatting artifact. Reinforced concrete mechanics — stress distribution