# Media credits for BGK Unit 1 {#agc-bgk-media-credits-unit-01}

Course source: **Kurs:Bündel, Garben und Kohomologie (Osnabrück 2019-2020)**, Kurs:Bündel, Garben und Kohomologie (Osnabrück 2019-2020)/Vorlesung 1. The single substantive media position retains its Commons identity and component licence. The two official PDFs are authority witnesses, not additional reader media positions.

1. **Tangent bundle of a manifold** - [File:Tangent bundle.svg](https://commons.wikimedia.org/wiki/File:Tangent_bundle.svg); creator/attribution: Oleg Alexandrov; licence/rights status: Public domain.

Rights note: the inline label in the BGK source is `PD`, whereas the frozen Commons description revision contains `{{PD-self}}` and the Commons metadata offers Public domain. The edition uses that Commons option, not the differing inline label.