aikalähteisiin
Aikalähteisiin, often translated as "time sources" or "chronological sources" in English, refers to materials and evidence that provide information about the passage of time, historical events, or the chronology of a particular subject. These can encompass a wide range of resources, both tangible and intangible, that historians and researchers utilize to construct timelines and understand the sequence of occurrences.
In historical research, aikalähteisiin can include written documents such as diaries, letters, official records, and chronicles.