What is a key difference between a public library and a college library?

Public libraries focus their purchases on books, while college libraries focus their purchases on periodicals.

A public library usually contains periodicals of general interest, such as Car and Driver, but a college library does not.

The librarians who work at college libraries are paid professionals, but the librarians who work at public libraries are unpaid volunteers.

The college library almost always has access to a wide range of scholarly resources that are not available at a public library.