You understand the mistake. You can't see the exact location from here.

Useful information is the call number (that is, the number of the book) and the collection place.

First, you enter the book collection, such as the comprehensive reading room.

Then, look for books according to the call number, for example, J060/454 1, which means that you want to find them in class J, and the category number is 454 1.

That is, 454 1 copy of J060.

You can basically tell at a glance. You can also ask the librarian to find the book you want in a minute or two.