Opening the book…
This page titled 3.2: Early period was last modified on Sun, 24 Jul 2022 16:16:42 GMT and is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Smarthistory.
The book could not be loaded just now.
Contents
Text
Size
From LibreTexts, under CC BY-NC-SA 4.0, as the source states it; its equations are written in TeX, which the PDF shows typeset. This page at LibreTexts.