For individual research help, schedule an appointment to meet with a librarian.
Use broad terms, as encyclopedias usually provide general overviews of topics.
radiotherapy
Use quotation marks ( " " ) around phrases (two or more words); this tells the database to look for the words in a specific order.
"gamma knife"
An encyclopedia is a type of reference book. Use a reference book to:
You will typically not use a reference book or encyclopedia as a source in your research. The information in these sources is for your own background knowledge.