How...am I supposed to know this? There are always people who call into the library not because they *really* want to know the answer to the question they've concocted, but because they want to talk to someone and the easiest way to get someone to talk to you for a few minutes is to trap them on the phone by asking questions no one could possibly know the answer to, and then asking why the person doesn't know it, don't they work in a library? Isn't this written down somewhere? Can't you just look it up? Can't you just ask The Google?