The textbook "Biologi for gymnasiet. 1:Botanikk"  by Norwegian botanist Thekla Resvoll.
<bdi><a href="https://en.wikipedia.org/wiki/en:Thekla_Resvoll" class="extiw" title="w:en:Thekla Resvoll"><span title="Norwegian botanist (1871-1948)">Thekla Resvoll</span></a>
</bdi>
<bdi><a href="https://en.wikipedia.org/wiki/en:National_Library_of_Norway" class="extiw" title="w:en:National Library of Norway"><span title="national library">National Library of Norway</span></a>
</bdi>