Easy
by ALOKKU ROUT
1. Substance systems
2. Economic system
2.1. Surplus
3. Managed
3.1. Unmanaged
3.1.1. Managed×××××
3.2. Harappan civilization
3.2.1. VEDIC AGE
3.2.1.1. Janpad
3.1.1. Managed×××××
3.2.1. VEDIC AGE
3.2.1.1. Janpad