28547_1.jpg:
Photographer/User: Biopics
License: CC BY-SA 4.0
License URL: https://creativecommons.org/licenses/by-sa/4.0
Credit: <span class="int-own-work" lang="en">Own work</span>

28547_2.jpg:
Photographer/User: Ercé
License: CC BY-SA 4.0
License URL: https://creativecommons.org/licenses/by-sa/4.0
Credit: <span class="int-own-work" lang="en">Own work</span>

28547_3.jpg:
Photographer/User: Teacoolish
License: CC BY-SA 3.0
License URL: https://creativecommons.org/licenses/by-sa/3.0
Credit: <span class="int-own-work" lang="en">Own work</span>

28547_4.jpg:
Photographer/User: HuskyBot
License: Public domain
License URL: Unknown
Credit: This digital media file - and/or the physical objects depicted on it - originates from the digital and/or physical collections of the <a rel="nofollow" class="external text" href="https://www.kb.nl/">Koninklijke Bibliotheek</a>, national library of the Netherlands.

28547_5.jpg:
Photographer/User: Fæ
License: Public domain
License URL: Unknown
Credit: <dl><dd><a href="//archive.org/details/poetgrayasnatura00nort" class="extiw" title="iarchive:poetgrayasnatura00nort"><bdi class="description en" lang="en" dir="ltr">Internet Archive identifier</bdi>: poetgrayasnatura00nort</a></dd>
<dd><a rel="nofollow" class="external free" href="https://archive.org/download/poetgrayasnatura00nort/poetgrayasnatura00nort.pdf">https://archive.org/download/poetgrayasnatura00nort/poetgrayasnatura00nort.pdf</a></dd></dl>