What does the term secondary source mean?

A secondary source of information is one that was created later by someone who did not experience first-hand or participate in the events or conditions you're researching.

Explanation:

Secondary sources were created by someone who did not experience first-hand or participate in the events or conditions you're researching. For a historical research project, secondary sources are generally scholarly books and articles

Explanation:

“the battle of stalingrad is not a turning point necessarily in strategic terms, because a lot more has to be done before the soviets can be certain of defeating germany,” says renowned world war ii historian richard overy. the germans had fought nearly a thousand miles across the soviet union to get to stalingrad.

bujías y una hora antes y no me parece muy difícil