Library research will provide several sources of information of value.
Books are still a wonderful source of information.
It generally takes longer for new information to find acceptance into the field and into the books of the field. However, good solid information on our understanding of the natural world presented in books, may be new to you. Books help create a fundamental understanding of your research area and provide a wide view of our understanding of the natural world. There are also a standardized protocol books, which are very useful. Libraries of the past consisted of huge volumes of information mainly in the form of books, periodicals and at times microfiche.