Does anyone know the key of Take 5 as played by the David Brubeck Quartet? I'm thinking its Bb, but I'm not 100% on my key signatures. Thanks!

I'll get a pic, if needed later, of my fake book's page, so you can see it, but I'm at school at the moment.
Eb minor (6 flats).
He who joyfully marches to music in rank and file has already earned my contempt.
He has been given a large brain by mistake, since for him the spinal cord would fully suffice.

Remember: A prudent question is one half of wisdom.