Title: A very handy reference work.
Review: Need a mail order catalog? 900 categories (such as art works, books, hats, umbrellas, yoga) lead you to 15,000 catalog entries, each with the regular address, 5,000 internet addresses, and phone (in many cases toll free numbers). Want to buy something (e.g., a camera, a VCR) and check out the options first? Look up the category, then contact the manufacturers or retailers. See what I mean handy?
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