McGraw-Hill Professional Book Group Masterfile

346,000 TOTAL USA ACTIVE BOOK BUYERS

Buyers and former members of one or more book club offered by McGraw-Hill for professionals interested in computers, electronics, architecture, business, how-to, mechanical engineering, civil engineering, chemical engineering or aviation, plus last 24-month purchasers of books on these subjects. The book clubs ceased operation in Feb 1999 and were replaced by a monthly solicitation program offering professional books on a positive-option plan.

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