- Estimates of Principal Characteristics (2-Digit Level Classification-NIC 2008) under Annual Survey of Industries in Prakasam District of Andhra Pradesh {(NIC : 01, 10 to 14, 16 to 18, 20 and 21) (2011-2012)}
- Estimates of Principal Characteristics (2-Digit Level Classification-NIC 2008) under Annual Survey of Industries in Prakasam District of Andhra Pradesh {(NIC : 22 to 25, 27, 35, 45, 52 and 82) (2011-2012)}