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Detailed explanation-1: -Local newspapers, journals, magazines, radio and TV stations are a great source to obtain data for secondary research . These commercial information sources have first-hand information on economic developments, political agenda, market research, demographic segmentation and similar subjects.

Detailed explanation-2: -One excellent source of secondary research data is government agencies; this data is usually available free of charge. On the other hand, data published by private companies may require permission, and sometimes a fee, for you to access it.

Detailed explanation-3: -Common sources of secondary data for social science include censuses, information collected by government departments, organizational records and data that was originally collected for other research purposes. Primary data, by contrast, are collected by the investigator conducting the research.

Detailed explanation-4: -Secondary data is usually gathered from the published (printed) sources. A few major sources of published information are as follows: Published articles of local bodies, and central and state governments. Statistical synopses, census records, and other reports issued by the different departments of the government.

Detailed explanation-5: -Census data is a primary source because it is the official process of methodically collecting information about a certain topic in a specific time period. Meaning, that it is a first-hand account of a topic, a.k.a. a primary source.