Census of India is the main source of secondary data. Explain
As India has very large population .
Demographic data of any country is estimated by census method,this mathod collects extensive form of data which composite birth , death ,employment , income ,etc.
It is used when size of population is very large.
Demographic data of any country is estimated by census method,this mathod collects extensive form of data which composite birth , death ,employment , income ,etc.
It is used when size of population is very large.