পাখির ডিমের খোলসের স্তর সমূহ।
<ul><li>SVG by <a href="https://cs.wikipedia.org/wiki/User:-xfi-" class="extiw" title="cs:User:-xfi-">cs:User:-xfi-</a></li>
<li>Translated into Bengali by <a href="//commons.wikimedia.org/wiki/User:S_Shamima_Nasrin" title="User:S Shamima Nasrin">User: S Shamima Nasrin</a></li></ul>
2019-02-28
<a href="//commons.wikimedia.org/wiki/File:Anatomy_of_a_bird_egg_shell.svg" title="File:Anatomy of a bird egg shell.svg">Anatomy of a bird egg shell</a>