What groups are the historical sources divided into?

There are several clarifications of historical sources:
1. Classification of I. Droysen.
Highlighted historical remains and historical legends.
2. Classification of L. N. Pushkarev.
He identified 3 types of historical sources: written, material, ethnographic. The type of “written” historical sources was divided into two types: documentary and narrative. He also identified species that are similar in structure to each other.
3. Classification of SO Schmidt.
Allocated material, pictorial, verbal, conventional, behavioral and sound sources.
4. Intentional and unintentional written sources.



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