Integrative Levels Classification project ILC2 schedules developing schedules how it works people references
ILC class tyv

ILC developing version
Expanded class tyv

   ▲  broader class

▽ ⌕         tyv            civilizations of south-Sahelian empires 15th-19th centuries  ≈ DDC 960
▽ ⌕         tyvw                 Great Zimbabwe civilization; Mutapa empire civilization 1450-1629 CE
 
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