Library of Congress
Research can be time-consuming and challenging. Don't get frustrated! Use the adage, "If at first you don't succeed, try, try again." Your teachers and librarians are here to help you, so ask a lot of questions!
Here's some more advice: Use Keywords wisely by thinking about synonyms and different word forms of your search terms, i.e. "Immigrants" or "Immigration" and "Italians" or "Italian Americans."
Popular Science Monthly, Vol. 82