31335016Sub-Saharan African First Intermediate Stone Age periodsPT2026-03-30 20:30:17UF31335017Sub-Saharan African First Intermediate Stone Age periodNDUF31335018period, Sub-Saharan African First Intermediate Stone AgeNDUF31335019periods, Sub-Saharan African First Intermediate Stone AgeNDBT31312578prehistoric Sub-Saharan African periodsPTNT31363344FauresmithPTNT31363345SangoanPT