Debelak Don Infiltration marketing : achieve astounding sales increases on a very low budget by entering your customer's world / Don Debelak. - Holbrook, Mass. : Adams Media, 2000. - xv, 254 p. : ill. ; 24 cm. Includes index. ISBN: 1580622631 Subjects--Topical Terms: Marketing LC Class. No.: HF5415 Dewey Class. No.: 658.8