English, asked by nazishkanwalkanwal, 4 months ago

teaching of efl verbs through physical activity at secondary level​

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Answered by itsmepapakigudiya
2

Answer:

These are sources that index, abstract, organize, compile, or digest other sources. Some reference materials and textbooks are considered tertiary sources when their chief purpose is to list, summarize or simply repackage ideas or other information. Tertiary sources are usually not credited to a particular author.

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