Fleck Franz Regularities of market penetration processes cause - Athenaeum Oelgeschtager Gunn and Hain 1981 - 162p. cm. - Athenaeum Economics. 2 . Bobliography: P 154-162 ISBN: 0899461174 Source: General Book Subjects--Topical Terms: Consumption Economics Dewey Class. No.: X:1:(B), M1