atlas
An almanac ( :
try your local library
The index of a reference book is typically located at the end of the book, after the main content and possibly after the bibliography or other supplementary material.
You can find information about "quantum mechanics" in the reference page of a physics textbook or a book specifically dedicated to the topic of quantum mechanics.
It will show you where you can find certain stuff in the book.
A telephone book.
Any reference book or textbook will teach you something. It depends on what you want to learn!
Blue Book of Gun Values, proofhouse.com
You can find an excellent reference about this subject in the book Convince with Confidence at comuneq.com
Have a reference librarian show you how to search a literary database for a book review.
Max Pulan got to you too, huh?
In the National Electric Code Book or in an Ugly's Electrical Reference book.