Averill, Mary. Network marketing : the business of the '90s / Mary Averill, Bud Corkin. - Menlo Park, Calif. : Crisp Publications, c1994. - vii, 78 p. : ill. ; 28 cm. - A Fifty-Minute series book . - Fifty-Minute series. . ISBN: 1560522445 Subjects--Topical Terms: Multilevel marketing. LC Class. No.: HF5415.126 / .A94 1994