21. Marketing information guide, annotated bibliography; [Sybella Clayton G'Schwend, managing editor]. Bookmark SuDoc number: C 41.11: (v.nos.&nos.)
22. Marketing information guide, annotated bibliography; [Sybella Clayton G'Schwend, managing editor]. Bookmark SuDoc number: C 41.11: (v.nos.&nos.)
23. Marketing information guide, annotated bibliography; [Sybella Clayton G'Schwend, managing editor]. Bookmark SuDoc number: C 41.11: (v.nos.&nos.)