What to say about this book? It's not dubbed the "Mathematical Bible" without a reason. It contains virtually everything one needs to know about math to be able to apply the knowledge in solving problems. I personally adore my Bronstein, as I fondly call it. It gave me information and inspiration on numerous written exams, and has been my constant companion on classes and at home. I can't recommend this book highly enough. It's necessary for everyone who aspires to be a mathematician, physicist or engineer.
This is an excellent reference book for engineers (or anyone who has to delve into mathematics once in a while), clearly written and very nicely indexed and organized (so finding what you need is easy). I had a copy with me for the most part of 40 years and it has served me quite well.