The Library of Congress Error Reporting Form
"Do everybody a favor and use it. The sooner they correct the errors the fewer catalogs contain the error, or have to correct it. I just reported the wrong call number in the record for Sun / by Stephen M. Tomecek ; illustrated by Carla Golembe. They have QE something, a geology number. So don't just complain, report it and help all of us to have better catalogs. "