The description of the index as shown above includes information to help you determine if the index will be useful. It is important to know what years are covered by the index. Look at your assignment. Are you looking for articles from a brief time period or are you looking for a historical pattern over a longer period of time. Read the description of the index to see what topics or discipline areas the index covers.
Some indexes only cover journal articles.
Others index newspaper articles, conference papers, technical reports and other types of publications that could be useful to you. Ask a librarian. Since librarians use the indexes every day in their work, they are experienced and able to recommend the index that best fits your research topic. The regulation of pollution credits. Choose effective keywords that communicate the main topic ideas.