Question

mention two sources of secondary data?

Answer 1

The following are some of the secondary sources of data. 
-Government publications such as reports of the Central Statistical Organisation, the Central and the State Government Ministries along with some of the apex institutions such as RBI, etc.
-Semi-Government publications such as reports of the Municipalities and Metropolitan Councils.
-Publications by international bodies such as WHO, UNO, etc.
-Private publications such as data published by the newspapers and journals, research institutes, reports of companies, articles, etc.
-Unpublished data of the government and other organisations.