Links to other important sources for direct marketing information:

American Marketing Association: www.ama.org

Direct Marketing Association: www.the-dma.org

DMA St. Louis Chapter: www.dmastl.org

Direct Magazine: www.directmag.com

DM News: www.dmnews.com

Mailing & Fulfillment Services Association: www.mfsanet.org

United States Postal Service: www.usps.com