00494pamaa2200157 4500 0000017462 20090930090000.0 0936889306 658.8343 MER HF5415.122 MER 1995 MERGENHAGEN Targeting transitions : marketing to consumers during life changes Paula Mergenhagen ; foreword by Judith Langer. New York: American Demographics Books, 1995. 253p.: 23cm. Marketing Langer, Judith