Analysis of information sources in references of the Wikipedia article "Hydrogen" in English language version.
Chapter 21.4.1 - This occurred when the age of the Universe was about 370,000 years.(Revised September 2017) by Keith A. Olive and John A. Peacock.
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: CS1 maint: multiple names: authors list (link)Chapter 21.4.1 - This occurred when the age of the Universe was about 370,000 years.(Revised September 2017) by Keith A. Olive and John A. Peacock.
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: CS1 maint: multiple names: authors list (link){{cite journal}}
: CS1 maint: multiple names: authors list (link)Chapter 21.4.1 - This occurred when the age of the Universe was about 370,000 years.(Revised September 2017) by Keith A. Olive and John A. Peacock.